Research on Sedimentary Microfacies of Sandstone Group I in Putaohua Oil Reservoir of Gu83 Block in Gulong Oilfield

2013 ◽  
Vol 787 ◽  
pp. 618-621
Author(s):  
Yang Liu ◽  
Cheng Zhi Liu ◽  
Hui Li ◽  
Xiao Jing Liu ◽  
Yu Cong Li
Keyword(s):  
Seismic Data ◽  
Oil And Gas ◽  
Delta Front ◽  
Group I ◽  
Core Logging ◽  
Work Area ◽  
Sedimentary Microfacies ◽  
Plane Distribution ◽  
Drilling Core ◽  
Sand Bodies

The oil and gas reserves of Gu83 block in Gulong oilfield is very abundant, but the development is very difficult because the sand bodies are thin, scattered and lack of horizontal continuity. Guided by the theory of sequence stratigraphy and reservoir sedimentology, using drilling core, logging and seismic data, the researcher found that the interest area belongs to delta front subfacies deposition, which can be mainly classified by four miscrofacies types including underwater distributary channel, mouth, sheet sand and bay between distributary. The plane distribution of sedimentary microfacies are mainly controlled by the west and north provenance, the two source collected in the middle east of the work area.

Analysis on the well Constraint Inversion of the Jason-Based Layer Flattening Seismic Data under the High-Resolution Isochronous Framework

2013 ◽  
Vol 416-417 ◽  
pp. 1135-1141
Author(s):  
Shi Fang ◽  
Xin Rong Zhang ◽  
Jin Ping Liu ◽  
Chun Lai Xie
Keyword(s):  
High Resolution ◽  
Seismic Data ◽  
Oil And Gas ◽  
Absolute Error ◽  
Oil Field ◽  
Obvious Effect ◽  
Sand Body ◽  
The Absolute ◽  
Plane Distribution ◽  
Sand Bodies

The later-period structure of Fuyang oil layer is very complex, and its reservoir mainly consists of riverway sand bodies; the oil and gas reservoir is significantly concealed, so it is greatly difficult to identify. In order to accurately predict sand bodies by using seismic data, a well constrained inversion is made to the layer flattening seismic data using Jason software under the high-resolution sequence framework. Through a comprehensive analysis on seismic and geological data, the absolute error is within ±500, the relative error is within 10%; the predicted sand body plane distribution is reasonable, and the absolute error of 82% sand bodies is less than 10%. This proves that well constrained inversion for the Jason-based layer flattening seismic data under the high-resolution isochronous framework has an obvious effect on the areas of complex later-period structure, and thin and complex changed sand bodies. Therefore, it can meet the needs of the oil field exploration and development to a certain extent.

Study of Sedimentary Microfacies of Putaohua Reservoir at Xu 30 Block in Yushulin Oil Field

2014 ◽  
Vol 962-965 ◽  
pp. 300-304
Author(s):  
Ming Qin ◽  
Shi Zhong Ma ◽  
Zan Gao ◽  
Xiao Fei Chen
Keyword(s):  
Oil And Gas ◽  
Oil Field ◽  
Distribution Law ◽  
Delta Front ◽  
Sedimentary Characteristics ◽  
Oil And Gas Exploration ◽  
Target Layer ◽  
Sedimentary Microfacies ◽  
Plane Distribution ◽  
Distributary Channel

Xu 30 block is located in the southwest of Yushulin oil field, Putaohua reservoir is the main reservoir. Based on the analysis of the core information and well logging facies elements, and combining with the sedimentary characteristics of the study area, this paper discusses the types of sedimentary microfacies of Xu 30 block in Yushulin oil field in order to guide the future oil and gas exploration and development. The results show that the target layer in the study area having obvious characteristics of underwater distributary channel is delta front facies, and it can be divided into underwater distributary channel, seat body, sheet sand, the inner front sheet sand and the external delta front sedimentary microfacies. Further analysis of sedimentary characteristics, this paper establishes logging microfacies models and draws out 9 time units sedimentary microfacies in plane distribution diagrams. This study can offer not only an important geologic evidence for Putaohua reservoir at Xu 30 block, but also a basement for the distribution law of oil, water and the remaining oil.

Controlling Factors of Hydrocarbon Accumulation in Talaha-Changjiaweizi Area

2013 ◽  
Vol 734-737 ◽  
pp. 1175-1178
Author(s):  
Hong Qi Yuan ◽  
Ying Hua Yu ◽  
Fang Liu
Keyword(s):  
Physical Properties ◽  
Oil And Gas ◽  
Controlling Factors ◽  
Source Rocks ◽  
Hydrocarbon Accumulation ◽  
Gas Migration ◽  
Main Controlling Factors ◽  
Sedimentary Microfacies ◽  
Plane Distribution ◽  
Distributary Channel

Based on the analysis of the relationships between the conditions of structures, sedimentations, source rocks, cap rocks, faults, oil and gas migration passages and traps and hydrocarbon accumulation, the controlling factors of hydrocarbon accumulation and distribution was studied in Talaha-changjiaweizi area. It is held that the source rocks control the hydrocarbon vertical distribution, the drainage capabilities control the hydrocarbon plane distribution, fracture belts control the hydrocarbon accumulation of Talaha syncline, underwater distributary channel is a favorable accumulation environment and reservoir physical properties control the oil and water distributions. Therefore, it is concluded that source rocks, fracture belts, sedimentary microfacies and reservoir physical properties are the main controlling factors of hydrocarbon accumulation and distribution in Talaha-changjiaweizi area.

scholarly journals Fine description of sedimentary system in Wuerxun Sag of Hailaer Basin

2020 ◽  
Vol 194 ◽  
pp. 05048
Author(s):  
ZHOU Yue ◽  
GAO Geng ◽  
WANG Duanyang ◽  
YANG Xu
Keyword(s):  
Large Scale ◽  
Oil And Gas ◽  
Sedimentary Facies ◽  
Key Factors ◽  
Oil And Gas Exploration ◽  
Fan Delta ◽  
Sedimentary System ◽  
Sedimentary Microfacies ◽  
Surrounding Areas ◽  
Sand Bodies

Wuerxun depression is one of the depressions with great exploration potential in Hailaer Basin and has submitted large-scale reserves. At present, it has entered the stage of fine exploration, and the exploration object has changed from structural reservoir to lithologic reservoir exploration. The remaining targets are mainly concentrated in the trough and surrounding areas, with strong concealment and difficult to identify. Fine identification of sand bodies, genesis, types and distribution of sedimentary fans are one of the key factors restricting oil and gas exploration. Based on core observation and genetic mechanism, three sedimentary facies models of Braided River Delta, fan delta and sublacustrine fan are established. In this paper, the method of “sequence control, cycle correlation and hierarchical closure” is used to fine characterize the fan delta sedimentary system in this area, which lays a foundation for the study of sedimentary microfacies of subdivision layers, optimization of lithologic reservoir targets and guidance of oil and gas exploration deployment.

Analysis on the FRSTM Fracture-Based Pre-Stack Seismic Azimuth Attributes of the Sand Bodies in Fuyang Oil Layer in Songliao Basin

2013 ◽  
Vol 443 ◽  
pp. 689-694
Author(s):  
Xin Rong Zhang ◽  
Shi Fang ◽  
Jin Ping Liu ◽  
Mao Xin Yang
Keyword(s):  
Oil And Gas ◽  
Space Distribution ◽  
Obvious Effect ◽  
Development Zone ◽  
Anisotropic Strength ◽  
Study Results ◽  
Sedimentary Microfacies ◽  
Oil And Gas Reservoir ◽  
The Relationship ◽  
Sand Bodies

The later-period structure of Fuyang oil layer is complex and its reservoir is mostly composed by the sand bodies of riverways. The oil and gas reservoir features obvious concealment, and also is difficult to identify. Therefore, in this study, the pre-stack seismic attributes of the sand bodies in riverways were identified using FRSTM fracture software in the study area, and the study results of the pre-stack detection on anisotropy showed that the relationship between the anisotropic development zone and the sedimentary microfacies is close and also they are affected by the fracture system. After a comprehensive analysis, it can be judged that the reliability of the anisotropic development features with fully-contained fluid or better physical properties after a pre-stack anisotropy analysis is very high, can objectively reflect the space distribution characteristics of the anisotropic strength at the targeted reservoir, and can plays an obvious effect on the areas of the complex later structure, and thin and complex sand bodies, so that the needs of oil fields exploration and development can be fulfilled.

Matlab and Geoscope Joint Inversion Technology under the Constraint of Isochronous Facies Controlled Multi-Point Geological Model

2013 ◽  
Vol 416-417 ◽  
pp. 1926-1934 ◽  
Author(s):  
Shi Fang ◽  
Xin Rong Zhang ◽  
Jun Li ◽  
Chun Lai Xie
Keyword(s):  
Statistical Model ◽  
Seismic Data ◽  
Oil And Gas ◽  
Joint Inversion ◽  
Oil Field ◽  
Space Distribution ◽  
Gas Reservoirs ◽  
Stochastic Inversion ◽  
Variation Function ◽  
Sand Bodies

The formation in Wudong area is complex, and oil and gas reservoirs are seriously concealed and very difficult to identify. Thus, to accurately predict the sand bodies by using seismic data, the facies controlled multi-point geological statistical model constrained inversion technology under the isochronous framework is applied. Through a comprehensive explanation on the seismic and geological data, the deposit facies space distribution in the study area is reveled, and then a very stable space variation function is solved in combination with the multi-point geological statistical model analyzed in the developed well. Seismic stochastic inversion constrained by the model is implemented, and its prediction accordance rate of the sand bodies reaches 87.5%, proving the facies controlled multi-point geological statistical model constrained inversion technology under the isochronous framework are only targeted at a few wells, and plays a very significant effect on the area of few wells, uneven distribution, and complex formation evolution. Thus, the model can meet the needs of the oil field exploration and development.

scholarly journals Sedimentary Characteristics Analysis and Sedimentary Facies Prediction of Jurassic Strata in the Northwest Margin of Junggar Basin—Covering the W105 Well Region in the Wuerhe Area

Minerals ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 68
Author(s):  
Shiqi Liu ◽  
Yuyang Liu
Keyword(s):  
Cross Sections ◽  
Oil And Gas ◽  
Junggar Basin ◽  
Sedimentary Facies ◽  
Delta Front ◽  
Delta Plain ◽  
Fan Delta ◽  
Single Well ◽  
Northwest Region ◽  
Sand Bodies

As the northwestern area of the Junggar Basin is a key area for oil and gas exploration, the sedimentary facies of the Jurassic formations in the Wuerhe area has long been a focus of research. The target strata are Jurassic strata, including five formations: the Lower Jurassic Badaowan and Sangonghe, the Middle Jurassic Xishanyao and Toutunhe and the Upper Jurassic Qigu. Disputes over the are sedimentary facies division exist in this area. Considering the W105 well region in this area as an example, the overall sedimentary facies of single-well logging facies is analyzed and then expanded to two cross-sections and characterized. Based on previous studies, a detailed overview of the regional stratigraphy is obtained by well logs and other data. Then, two cross-sections are selected and analyzed. The single-well and continuous-well facies of 10 wells in the sections are analyzed to grasp the sand bodies’ spatial distribution. Finally, a planar contour map of the net to gross ratio is mapped to analyze the sources and the distribution of the sand bodies in each period. The sedimentary facies map is also mapped to predict the sedimentary evolution. The results show that the sedimentary facies of the Badaowan Formation in the study area was an underwater distributary channel of the fan-delta front, and the sand body spread continuously from northwest to southeast. The Sangonghe Formation entered a lake transgression period with a rising water level, at which time shore–shallow lacustrine deposits were widespread throughout the region. The period of the Xishanyao Formation entered a regression period, the northwest region was tectonically uplifted, and the central and southeastern regions facies were dominated by the fan-delta front and shallow lacustrine. During the Toutunhe Formation period, the northwest region continued to uplift and was dominated by delta plain facies. During the period of the Qigu Formation, the thickness of stratigraphic erosion reached its maximum, and the non-erosion area of the study area was mainly deposited by the fan-delta plain. Overall, the Jurassic system in the W105 well area is a fan delta–lacustrine–fan delta sedimentary system.

Sedimentology and Reservoir Characteristics of He8 Member, in a Gas Field of Ordos Basin, Northern China

2013 ◽  
Vol 734-737 ◽  
pp. 161-165 ◽  
Author(s):  
Er Ping Fan ◽  
Yue Hong Cheng ◽  
Yuan Zhi Zhang ◽  
Zhen Hua Bai
Keyword(s):  
Oil And Gas ◽  
Ordos Basin ◽  
Northern China ◽  
Gas Field ◽  
Meandering River ◽  
Base Level ◽  
Oil And Gas Field ◽  
Porosity And Permeability ◽  
Sedimentary Microfacies ◽  
Sand Bodies

The rapid lateral variation of fluvial sand-bodies seriously affect the development of oil and gas field. One long-term base-level cycle (LSC), four middle-term base-level cycles (MSC) and nine short-term base level cycles (SSC) are recognized by researching the stacking patterns and volumetric partitioning according to the core, well log and seismic data in He8 member of A gas field, Ordos basin. The base level cycles which are mainly base level rise half cycles are mainly composed of braided and meandering river deposits. The evolution of depositional system has experienced three stages: braided river deposition in the earlier stage, braided and meandering river transition coexistence in the middle stage and only meandering river deposition in later period. The braided channel sand, mid-channel bar and point bar are mainly reservoirs which show belt and ribbon along the SEE trending. These sand-bodies are vertically and laterally stacked with good continuity in the early MSC1, MSC2 and MSC3, while isolated and with poor continutiy in the early MSC4. The sedimentary microfacies and diagenesis affect the fluvial reservoir quality including lateral continuity, porosity and permeability and the buried depth of the good reservoirs with development of secondary solution pores is less than 3500m in this area.

Investigation of the qualities of some promising oils of the Absheron oil and gas region

2021 ◽  
Vol 02 ◽  
pp. 22-26
Author(s):  
Yu.A. Abdulayeva ◽  
◽  
N.H. Alekperova ◽  
S.B. Logmanova ◽  
N.F. Kafarova ◽  
...  
Keyword(s):  
Sulfur Content ◽  
Oil And Gas ◽  
Viscosity Index ◽  
Hydrocarbon Composition ◽  
High Viscosity ◽  
Group I ◽  
Oil Fractions ◽  
Low Sulfur Content ◽  
Selective Refining ◽  
Low Sulfur

The article presents the characteristics of characteristic oils of the Apsheron oil and gas region, as well as the hydrocarbon composition of light and oil fractions. Oils of the Apsheron oil and gas region in terms of light fractions, sulfur content, and density are comparable to marketing grades of oils. The standards for prices are: graded crude oil WTI, Light Sweet, Brent, and Russian oils Sokol, Urals, Siberian Light are approaching them. We have studied in detail the yields and hydrocarbon composition of light and oil fractions of oils from the Apsheron oil and gas region. To obtain oils with a high viscosity index, studies were carried out to change the structure of oil fractions using hydrogen using the example of oil fractions of Azeri oil. Due to the significant content of aromatic hydrocarbons, schemes for the processing of oil fractions have been developed, including selective purification of distillates, dewaxing (except for Guneshli oil), as well as hydrocatalytic treatment in a severe mode in the presence of industrial Russian catalysts. As a result, it was possible to obtain API group I oils, according to the viscosity classification corresponding to SAE 20 and SAE 30. Thus, a study of the qualities and hydrocarbon composition of oils from the Absheron oil and gas region showed that these oils are characterized by a high content of light fractions, low density, and low sulfur content. According to these indicators, these oils correspond to the marker oils. In order to obtain base oils with a viscosity index of ≥90 and an aromatic hydrocarbon content of ≥10, a traditional refining method was used: selective refining, dewaxing, and severe hydrotreating.

COMPUTER MODELING OF THE SAND BODIES DEPOSITIONAL HISTORY OF THE MIDDLE JURASSIC PETROLEUM PLAY (BY THE EXAMPLE OF THE GERASIMOVSKOE FIELD, WESTERN SIBERIA)

2020 ◽  
pp. 8-13
Author(s):  
M. O. Fedorovich ◽  
◽  
A. Yu. Kosmacheva ◽  
Keyword(s):  
Middle Jurassic ◽  
Oil And Gas ◽  
Gas Condensate ◽  
Facies Modeling ◽  
Depositional History ◽  
Sedimentary Environments ◽  
History Of ◽  
Underwater Slope ◽  
Mouth Bars ◽  
Sand Bodies

The present paper describes the DIONISOS software package (Beicip-Technologies), where the reconstruction of the accumulation conditions and facies modeling of sand reservoirs Yu10, Yu9, Yu8, Yu7 and Yu6 of the Tyumenskaya Formation and carbonaceous-clay members acting as fluid seals within the Gerasimovskoye oil and gas condensate field located in the south of the Parabel district of the Tomsk region. Reconstructions of facies environments make it possible to consistently restore conditions and create a general principled model of the accumulation of sandy-argillaceous deposits of the Middle Jurassic PP in a given territory. Polyfacies deposits of the Bajocian are represented by sands of distributaries and stream-mouth bars, underwater slope of delta, above-water and underwater delta plains, argillaceous-carbonaceous sediments of floodplain lakes, bogs, marshes and lagoons, clays formed at the border of the above-water and underwater deltaic plains, silt deposits of above-water and underwater delta plains, prodelta clays. As a result of the 3D facies model construction, it is shown that the subcontinental sedimentary environments of sand reservoirs Yu10–Yu8 are replaced by deltaic and floodplain-lacustrine-boggy ones, and the formation of Yu7–Yu6 reservoirs occurs in conditions of coastal plain, periodically flooded by the sea. In total, 5 lithotypes of sand deposits have been identified, 1 – argillaceous-carbonaceous, 2 – argillaceous and 1 – silty. Computer facies 3D modeling of the sand bodies assemblage (hydrocarbon reservoirs) of the Bajocian age for the Gerasimovskoye oil and gas condensate field has been performed.

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