scholarly journals Evaluation of volcanic gas reservoir in Yingcheng formation of Block Shengshen2-1 of Northern Part of Songliao Basin

2019 ◽  
Vol 118 ◽  
pp. 03033
Author(s):  
Yue Zhou ◽  
Haibo Wu
Keyword(s):  
Volcanic Rocks ◽  
Gas Content ◽  
Composition Analysis ◽  
Physical Analysis ◽  
Volcanic Gas ◽  
Thin Sections ◽  
Rock Density ◽  
Yingcheng Formation ◽  
Log Interpretation ◽  
Well Data

According to the thin sections of volcanic rocks, chemical composition analysis and log interpretation, and well data, it is determined that the volcanic rocks of Yingcheng Formation in Shengshen 2-1 block are mainly intermediate-acid volcanic lava and pyroclastic rocks. Through physical analysis of core samples, it is considered that Shengshen 2-1 block belongs to low-porosity and low-permeability reservoir. Microfracture-fracture is relatively developed in the compact section, and fracture is not developed in the porous section. Microfracture and reticular fracture can be seen in the thin section. Statistical analysis of porosity and density of volcanic reservoir shows that volcanic rock density below 2.53 can be used as reservoir. According to the relationship between reservoir space and gas content, the characteristics of volcanic lithology, lithofacies and reservoir space, the reservoir in this block can be divided into four types.

Spatial and temporal distributions of the late Mesozoic volcanic successions and their controlling effects on the Changling fault depression of the Songliao Basin, northeast China

2017 ◽  
Vol 54 (12) ◽  
pp. 1194-1213 ◽  
Author(s):  
Wenbo Chang ◽  
Xuanlong Shan ◽  
Jian Yi ◽  
Tiantian Du ◽  
Yue Qu
Keyword(s):  
Partial Melting ◽  
Fractional Crystallization ◽  
Early Stage ◽  
Volcanic Rocks ◽  
Songliao Basin ◽  
Basic Magma ◽  
Small Scale ◽  
Late Mesozoic ◽  
Yingcheng Formation ◽  
Well Data

Volcanic successions, including their spatial, temporal, tectonic, and geochemical attributes, were identified based on well data, 2D and 3D seismic data, U–Pb isotopic ages, and major and trace element data from the Changling fault depression of the Songliao Basin in northeastern China. Three eruption cycles developed in the Changling fault depression: K1h (Huoshiling Formation) (124–118 Ma), K1yc1 (first member of the Yingcheng Formation) (115–106 Ma), and K1yc3 (third member of the Yingcheng Formation) (106–102 Ma). These three eruption cycles comprised seven eruption stages. The volcanic successions in every eruption cycle were bimodal and evolved from basic to acidic. The magma of the basic and intermediate rocks in these cycles was derived from partial melting of the asthenosphere. In K1yc1 and K1yc3, partial melting of the newly formed basic rocks in the lower crust formed the high-SiO2 acidic magma. In addition, fractional crystallization of basic magma formed the small-scale intermediate–acidic magma. In K1h, the most likely origin of the acidic magma was fractional crystallization of basic magma. During the early stage of the fault depression, the volcanic rocks of K1h were controlled primarily by the boundary fault activity. In K1yc1 and K1yc3, basic–intermediate rocks were distributed widely along syngenetic faults, and acidic rocks were concentrated in areas where the syngenetic faults had their largest amplitudes. Multiple cycles and stages of the volcanic successions were controlled by magmatic evolution, and the spatial distribution was controlled by basin tectonics.

scholarly journals THE SÃO TOMÉ CAPE TRANSFER ZONE IN THE CAMPOS BASIN

2020 ◽  
Vol 38 (1) ◽  
Author(s):  
Raquel Theodoro Amancio da Silva
Keyword(s):  
Volcanic Rocks ◽  
Underground Water ◽  
Magnetic Data ◽  
Basement Faults ◽  
Water Wells ◽  
Campos Basin ◽  
Log Interpretation ◽  
Well Data ◽  
Tectonic Boundary ◽  
Transfer Zone

ABSTRACT. This dissertation presents as contribution to the scientific community the compilation of most of the data available on terrestrial and coastal regions of the Campos Basin. Were compiled gravity and magnetic data, geology, seismic-well log interpretation and, information about the depth of the basement from underground water wells. The São Tomé Cape Transfer Zone was characterized as the major tectonic boundary between the Graben of Barra de São João tectonic domain, characterized here as an aulacogen, and the onshore portion of the Campos Basin, which has the volcanic rocks of the Cabiúnas Formation as basement. It was possible to follow the extension of that framework to the marine region, where can be perceived a structural reversal in dip direction of the basement faults. The revaluation of the well CST-001 well data performed by me and Cecília Lana in cooperation allowed the interpretation of a thick sedimentary section in the terrestrial region of the Campos Basin, which was considered until then constituted only by Terciary rocks. Based on all the information compiled it is being proposed here a new design for the hinge line of the Campos Basin because it represents originally a sedimentary boundary between Tertiary and Cretaceous rocks. A ZONA DE TRANSFERÊNCIA DO CABO DE SÃO TOMÉ NA BACIA DE CAMPOSRESUMO. Esta dissertação apresenta como contribuição para a comunidade científica a compilação de grande parte dos dados disponíveis nas regiões terrestre e costeira da bacia de Campos. Foram compilados dados gravimétricos e magnéticos, geologia, interpretações sísmica e de poços exploratórios e informação sobre a profundidade do embasamento proveniente de poços de água subterrânea. A Zona de Transferência do Cabo de São Tomé foi caracterizada como o principal contato tectônico entre o domínio tectônico do Graben de Barra de São João, caracterizado aqui como um aulacógeno, e a porção terrestre da Bacia de Campos, que tem as rochas vulcânicas da Formação Cabiúnas com embasamento. Foi possível seguir a extensão daquela estrutura para a região marinha, onde pode ser percebido uma reversão estrutural na direção de mergulho das falhas do embasamento. A reavaliação do poço CST-001 realizada por mim e Cecília Lana em cooperação permitiu a interpretação de uma espessa seção sedimentar na região terrestre da bacia, que era considerada até então constituída apenas por rochas de idade Terciária. Baseando me nas informações compiladas estou propondo aqui um novo desenho para a linha de charneira da Bacia de Campos porque originalmente esta estrutura representa um contato sedimentar entre o Terciário e o Cretáceo.

Analysis of the Accumulation Conditions for Volcanic Gas Reservoirs: A Case from Deep Yingcheng Formation, Southern Part of Songliao Basin

2013 ◽  
Vol 848 ◽  
pp. 273-278
Author(s):  
Yi Wu ◽  
Wei Chao Tian
Keyword(s):  
Large Scale ◽  
Volcanic Rocks ◽  
Songliao Basin ◽  
Gas Reservoirs ◽  
Volcanic Gas ◽  
Gas Reservoir ◽  
Rock Types ◽  
Yingcheng Formation ◽  
Study Results ◽  
Reservoir Conditions

Volcanic gas reservoir in deep Southern Songliao Basin has became source for incremental oil and reserves. Due to the low degree of exploration, study on the accumulation condition for volcanic gas reservoir is insufficient, to some extent, influencing the effectiveness of exploration. In this paper, the accumulation conditions for volcanic gas reservoir have been analyzed systematically including the source rock conditions, reservoir conditions, sealing conditions, conducting conditions and trap conditions. The study results show that large-scale coal-bearing strata in Shahezi Formation can provide sufficient gas for volcanic gas reservoir: the fracture systems in deep volcanic rocks can communicate with the earlier developed pores, fractures and caves, forming good reservoir and flow space; It contains multiple rock types with good preservation condition, the mudstone in first member of Quan Formation is better regional seal. Mudstone in third and fourth member of Denglouku Formation and Shahezi Formation are favorable local seals, with good seal capability for volcanic rocks gas accumulation in Yingcheng Formation. ontains three types of transporting pathways: permeable formation, unconformity and fault.

Rock density from borehole gravity surveys

Geophysics ◽  
1983 ◽  
Vol 48 (3) ◽  
pp. 341-356 ◽  
Author(s):  
T. R. LaFehr
Keyword(s):  
Bulk Density ◽  
Apparent Density ◽  
Density Change ◽  
Large Radius ◽  
Rock Density ◽  
Density Anomaly ◽  
Poisson Jump ◽  
The Difference ◽  
Well Data ◽  
Station Location

The borehole gravity meter (BHGM) is recognized as an important logging tool for obtaining formation bulk density. In general, however, the difference between two gravity observations vertically separated in a well leads to an apparent and not the actual bulk density. BHGM‐derived apparent densities are equal to the formation bulk densities when the instrument passes through beds which are horizontal, infinitely extended laterally, uniformly thick, and constant in density. For many applications, departures from these assumed conditions are so slight that their effects can be ignored, and the BHGM essentially yields bulk density with a large radius of investigation. In the presence of anomalous masses, significant distortion in formation bulk density is possible. The apparent density anomaly produced in the well by an elongated, offset density contrast is proportional to the angle subtended by the density‐change interface. For a density‐change boundary having circular symmetry with respect to the well, the apparent density anomaly at the center of the bed is proportional to the sine of the subtended angle. Because the distortion in bulk density is the same above a horizontal boundary as it is just below (in the limit, at the boundary, for a normally incident well), an abrupt change in apparent density is equal to the real density change at the boundary. This change in density, termed “the Poisson jump,” is independent of geometry; our ability to measure it, however, is a function of station location with respect to the geologic bodies. Two methods are suggested for obtaining bulk densities from BHGM apparent densities: (1) by obtaining two stations just outside as well as just within the zone of interest, the Poisson jump can be approximated and added to an independent density source (e.g., the gamma‐gamma log), and (2) the apparent density anomaly within the formation of interest can be derived by modeling (perhaps based on seismic or well data) and added to the BHGM‐determined densities. Thinner beds can be studied with the BHGM than generally believed, even with much greater station spacing.

Mineralogical characterization of fibrous zeolites from the Kahrizak volcanic suite, south Tehran, Iran

Clay Minerals ◽  
2010 ◽  
Vol 45 (4) ◽  
pp. 507-517 ◽  
Author(s):  
M. Kusehlar ◽  
F. Tutti ◽  
H. Mirnejad ◽  
A. E. Lalonde
Keyword(s):  
Volcanic Rocks ◽  
Hydrothermal Activity ◽  
Scattered Electron ◽  
Northern Iran ◽  
Mineralogical Characterization ◽  
Thin Sections ◽  
Rich Solution ◽  
Cavity Filling ◽  
Fibrous Zeolites

AbstractSelected samples of large cavity filling and vein-type fibrous zeolites from Eocene volcanic rocks in the Kahrizak region, northern Iran, have been studied for their mineralogical and chemical characteristics. X-ray powder diffraction and electron microprobe analyses confirmed the presence of natrolite, mesolite and scolecite with compositions of [Na14.922Ca0.202K0.015Ba0.002] [Al15.697Si24.267O80]·nH2O, [Ca15.714Na14.224][Al46.431Si73.398O240]·nH2O and [Ca7.804Na0.142K0.024Ba0.012Mg0.006][Al15.320Si24.437O80]·nH2O, respectively. In addition, examination of textural relationships in thin sections and back-scattered electron images reveals a paragenetic order in which the Ca-rich zeolites crystallized first. It is most probable that the fibrous zeolites of Kahrizak were formed during two pulses of hydrothermal activity in the area. Scolecite and mesolite were precipitated from Ca-rich solution, whereas the second stage Na-rich, low-temperature fluid crystallized natrolite and reacted with Ca-species.

scholarly journals THE LOWER SILURIAN TERRIGENOUS DEPOSITS OF THE LAOELING-GRODEKOVO TERRANE (SOUTH PRIMORYE): MATERIAL COMPOSITION AND FORMATION SETTINGS

2021 ◽  
pp. 25-44
Author(s):  
A.I. Malinovsky ◽  
◽  
V.V. Golozubov ◽  
Keyword(s):  
Sedimentary Basin ◽  
Volcanic Rocks ◽  
Source Area ◽  
Island Arc ◽  
Material Composition ◽  
Recycling Rate ◽  
Composition Analysis ◽  
Rock Composition ◽  
South Primorye ◽  
Genetic Interpretation

This paper studies the original results of the material composition analysis of the Early Silurian terrigenous deposits of the Kordonka formation of the Paleozoic – Early Mesozoic Laoeling-Grodekovo terrane of the South Primorye. The research is aimed at reconstructing paleogeodynamic setting of the deposition of sediments of the formation, and determining the type and mother rock composition of the feed sources based on the complex genetic interpretation of the material composition of rocks. It was established that mineralogically and geochemically formation of the rocks correspond to the typical graywackes and represent petrogenic or “first cycle” rocks formed mainly through the source rock failure. They are characterized by a low maturity, low lithodynamic recycling rate of mother rocks and their rapid burial. The interpretation of the results of the complex study of the material composition of the rocks was carried out on the basis of its comparison with the compositions of ancient rocks and modern sediments formed in the well-known geodynamic settings. The obtained data indicate that deposits of the Kordonka formation accumulated in a sedimentary basin connected with an oceanic island arc. Being built by basic and intermediate volcanic rocks as well as by igneous and sedimentary rocks that constituted its base, this island arc was the source area that supplied clastic material to the aforementioned sedimentary basin.

HYDROCARBON GASES IN SEAFLOOR SEDIMENTS, OTWAY AND GIPPSLAND BASINS: IMPLICATIONS FOR PETROLEUM EXPLORATION

1989 ◽  
Vol 29 (1) ◽  
pp. 96 ◽  
Author(s):  
G.W. O'Brien ◽  
D.T. Heggie
Keyword(s):  
Liquid Hydrocarbon ◽  
Source Rocks ◽  
Petroleum Exploration ◽  
Gas Content ◽  
Hydrocarbon Gases ◽  
Near Surface ◽  
Wet Gas ◽  
Well Data ◽  
Seafloor Sediments ◽  
Gippsland Basin

During April- May 1988, the BMR research vessel Rig Seismic carried out a 21- day geochemical and sedimento- logical research program in the Otway (17 days) and Gippsland (4 days) Basins. The concentrations and molecular compositions of light hydrocarbon gases (C1- C4) were measured in sediments at 203 locations on the continental shelf and upper continental slope: the presence of thermogenic hydrocarbons was inferred from the molecular compositions of the gas mixtures. Thermogenic hydrocarbons were identified in near- surface sediments at 32 locations in the Otway Basin; 6 of these locations were on the Crayfish Platform, 7 were on the Mussel Platform and 17 were in the Voluta Trough. Thermogenic hydrocarbons were identified at 10 locations in the Gippsland Basin. Data from the Otway Basin indicated that total C1- C4 gas concentrations were higher in the Voluta Trough than on the basin margins, probably because intense faulting in the trough facilitates gas migration from deeply buried source rocks and/or reservoirs to the seafloor. However, anomalies were detected where the Tertiary sequence was thick and relatively unfaulted. The wet gas contents of the anomalies were highest on the basin margins, lower in the Voluta Trough and co- varied with the depth of burial of the basal Early Cretaceous sedimentary sequence. These data, when integrated with geohistory, thermal maturation modelling and well data, suggest that the areas with the best potential for liquid hydrocarbon entrapment and preservation are the Crayfish Platform and the inshore part of the Mussel Platform. In contrast, the Late Cretaceous Sherbrook Group and much of the Voluta Trough appear to be gas prone.Thermogenic anomalies in the Gippsland Basin were concentrated within and along the margins of the Central Deep where mature Latrobe Group source rocks are present. The wet gas content of these anomalies was variable, which is consistent with the spatial heterogeneity of hydrocarbon accumulations in the Gippsland Basin.

The Effect of Stress-Sensitivity on Gas well Production in Volcanic Gas Reservoirs

2014 ◽  
Vol 962-965 ◽  
pp. 636-641
Author(s):  
Tian Qing ◽  
Peng Cheng Liu ◽  
Zong Yao Qi
Keyword(s):  
Volcanic Rocks ◽  
Development Program ◽  
Prediction Method ◽  
Stress Sensitivity ◽  
Gas Production ◽  
Gas Reservoirs ◽  
Volcanic Gas ◽  
Exponential Relationship ◽  
Gas Well ◽  
Well Productivity

During the volcanic gas reservoirs development, stress-sensitivity will result in permeability decline with formation pressure drop, lowering gas production and affecting the whole gas reservoirs development program. On the basis of the stress-sensitivity experiments on volcanic rocks, the characteristic of stress-sensitivity in volcanic reservoirs is analyzed. On this basis, this paper studies the prediction method of gas well productivity in volcanic gas reservoirs with stress-sensitivity, and establishes the mathematical model of constant pressure production in volcanic gas reservoirs. The results show that the permeability of volcanic rocks has an exponential relationship with effective stress. The stronger the stress-sensitivity is, the more the gas well productivity losses under the same conditions. And the reservoir stress-sensitivity will increase the degree of gas well unsteady production decline.

scholarly journals Stratigraphic analysis and calculation of reserves in the Colorado field, MMV, Colombia

2016 ◽  
pp. 24-31
Author(s):  
Ricardo Mier-Umaña ◽  
Tania Sarith Palmera Henao ◽  
Juan Sebastian Luna-Osorio ◽  
Leidy Alexandra Delgado-Blanco
Keyword(s):  
Oil And Gas ◽  
Well Log ◽  
Stratigraphic Analysis ◽  
Original Oil In Place ◽  
Log Interpretation ◽  
Well Data ◽  
Fluvial Environments ◽  
Well Log Interpretation

Based on review of previous information and correlation of 7 lithostratigraphic sections from well data, it was possible to establish the presence of channels in fluvial environments of the Mugrosa Formation, with good lateral continuity, in the B and C zones, in the Middle Magdalena Valley Basin (VMM). The results of well log interpretation (NSP logs) indicate the presence of channel sands and proved the previous sedimentological model of the field. In the sedimentological model proposed, zones B and C (Mugrosa Formation) show a very good lateral continuity of sands. The reserve calculations of original oil in place (OOIP) and original gas in place (GOES) indicates that the largest reserves of oil and gas are located in the zone C, with reserves of 118 million bbl and 33.9 Gigas of cubic feet respectively.

scholarly journals Study on volcanic reservoir characteristics of Yingcheng Formation in Xudong area of Xujiaweizi fault depression

2020 ◽  
Vol 194 ◽  
pp. 01038
Author(s):  
WANG Jia ◽  
ZHOU Yue
Keyword(s):  
Volcanic Rocks ◽  
Production Capacity ◽  
Secondary Porosity ◽  
Development Zone ◽  
Reservoir Characteristics ◽  
Reservoir Development ◽  
Volcanic Reservoir ◽  
Yingcheng Formation ◽  
Rhyolitic Tuff ◽  
Air Vent

Types of deep reservoir rich in Yingcheng formation of Xudong area in Xujiaweizi fault depression, the study of volcanic rocks of Yingcheng formation in the main, using the date of core, logging, oil test, from lithology, lithofacies and physical properties to study volcanic reservoir characteristics. The main lithology of volcanic reservoir in Yingcheng formation of Xudong area include rhyolite, rhyolitic tuff, rhyolitic tuff fused, rhyolitic breccia and rhyolitic tuff breccia. In accordance with lithology combination of features, volcanic facies can be divided into volcanic explosive facies, volcanic effusive facies and volcanic sedimentary facies. The main types of porosity have air vent of primary pore, remnants pores of air vent filled after, cracks, micro-cracks and feldspar corrosion hole of secondary porosity, volcanic ash corrosion hole, micro-pore produced by rhyolitic glass from glass off in spherules rhyolite, quartz crystal chip corrosion hole, and so on. Through studying the ratio of reservoir and formation for a single well, the frequency distribution of reservoir thickness, production capacity situation and pool-forming regularity, Xudong area can be divided into three reservoir development zone, so we will find out the most favorable reservoir development zone, then it can play a guiding role for the next step of the exploration deployment.

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