Research on the Distriution Rules and Calculation Method of the Parameters of Reservoir of Putaohua Groups in Yushulin Oil Field

2014 ◽  
Vol 490-491 ◽  
pp. 468-472
Author(s):  
Ke Zeng ◽  
Zheng Zhou ◽  
Mei Ling Zhang
Keyword(s):  
Physical Property ◽  
Analysis Data ◽  
Well Logging ◽  
Oil Field ◽  
Core Analysis ◽  
The Core ◽  
Reservoir Property ◽  
Porosity And Permeability ◽  
The Relationship ◽  
Parameters Calculation

Based on the Putaohua groups in Yushulin oil field, and through the statiscics and analyses, weve found that the reservoir property of this area is in the range of specially low permeability level. So due to the low porosity and permeability, its necessary to do some reaearch on the parameters calculation method.This papers analysed the relationships between the physical property parameters such as porosity, permeability, shale content and the well logging responses such as AC, SP, GR, then we built the distribution rules histograms of each physical property parameter. And we got the distribution situations of the parameters of the oil groups. Through the multiple regression, we built the relationship formulas between the reservoir property parameters and the well logging responses by using the core analysis data of 53 test wells. Afetr comparing the parameters of calculation and the core analysis data, we found that the deviation is small, which meets the production requires of oil field.

scholarly journals Sedimentology, geochemistry and reservoir properties of Upper Jurassic deep marine sediments (Hareelv Formation) in the Blokelv-1 borehole, Jameson Land Basin, East Greenland

2018 ◽  
pp. 39-64
Author(s):  
Morten Bjerager ◽  
Claus Kjøller ◽  
Mette Olivarius ◽  
Dan Olsen ◽  
Niels H. Schovsbo
Keyword(s):  
Oxygen Depletion ◽  
Upper Jurassic ◽  
High Density ◽  
Core Analysis ◽  
Reservoir Properties ◽  
East Greenland ◽  
Sea Floor ◽  
The Core ◽  
Trace Metal Content ◽  
Porosity And Permeability

The fully cored Blokelv-1 borehole was drilled through Upper Jurassic strata in the central part of the Jameson Land Basin, central East Greenland. The borehole reached a total depth of 233.8 m with nearly 100% recovery of high-quality core. An extensive analytical programme was undertaken on the core; sedimentological interpretation and reservoir characterisation were based on facies analysis combined with conventional core analysis, bulk geochemistry and spectral gamma and density scanning of the core. The Upper Jurassic Hareelv Formation was deposited in relatively deep water in a slope-to-basin setting where background sedimentation was dominated by suspension settling of organic-rich mud in oxygen-depleted conditions. Low- and high-density gravity-flow sandstone interbeds occur throughout the cored succession. About two-thirds of the high-density turbidite sandstones were remobilised and injected into the surrounding mud-rock. The resulting succession comprises nearly equal amounts of mudstones and sandstones in geometrically complex bodies. Ankerite cementation occurs in 37% of the analysed sandstones in varying amounts from minor to pervasive. Such ankerite-cemented sandstones can be identified by their bulk geochemistry where Ca > 2 wt%, Mg > 1 wt% and C > 1 wt%. The analysed mudstones are rich in Al, Fe, Ti and P and poor in Ca, Mg, Na and Mn. The trace-metal content shows a general increase in the upper part of the core reflecting progressive oxygen depletion at the sea floor. The reservoir properties of the Blokelv-1 sandstones were evaluated by both conventional core analysis and using log-derived porosity and permeability curves. The high-density turbidite beds and injectite bodies are a few centimetres to several metres thick and show large variations in porosity and permeability, in the range of 6–26 % for porosity and 0.05–400 mD for permeability. Individual sandstone units that are 1–7 m thick yield a net vertical reservoir thickness of 40 m with porosities of 15–26% and permeabilities of 1–200 mD. Heterolithic sandstone–mudstone units are generally characterised by poor reservoir quality with porosities of 2–14% and permeabilities of 0.1–0.6 mD.

TANAMI-1 OIL DISCOVERY: BARROW SUB-BASIN

1992 ◽  
Vol 32 (1) ◽  
pp. 86
Author(s):  
V. Beales ◽  
E.A. Howell
Keyword(s):  
Lower Cretaceous ◽  
Analysis Data ◽  
Core Analysis ◽  
Residual Oil ◽  
The South ◽  
Reservoir Properties ◽  
Offshore Area ◽  
Early Tertiary ◽  
Porosity And Permeability ◽  
Made In

The Tanami oil discovery was made in 1991. The discovery well was drilled from an onshore location on Varanus Island and deviated into the offshore area. A small, 6.8 m oil column was intersected at the top of the Lower Cretaceous Flag Sandstone Member of the Barrow Group. Beneath the moveable oil, a residual zone of 19.8 m was encountered.Petrophysical, petrological and core analysis data indicate different reservoir properties in the moveable oil, residual oil and water zones. These results show that the oil in place has retarded diagenesis and associated reduction in porosity and permeability values.The residual oil column is interpreted to be a result of northward structural tilting in the early Tertiary, causing oil previously trapped to be spilled to the south.

Correlations among Thermal Conductivity, Porosity, and Permeability of Mesozoic Sandstones and Siltstones from the Southern Regions of the West Siberian Plate

2021 ◽  
Author(s):  
A.D. Duchkov ◽  
D.E. Ayunov ◽  
L.S. Sokolova ◽  
P.A. Yan
Keyword(s):  
Thermal Conductivity ◽  
Rapid Assessment ◽  
The West ◽  
The Core ◽  
Approximate Estimation ◽  
Porosity And Permeability ◽  
Water Saturated ◽  
The Relationship ◽  
Khanty Mansi Autonomous ◽  
Measured Thermal Conductivity

Abstract —We consider results of measurements of thermal conductivity, porosity, and permeability for 780 samples of Mesozoic sandstones and siltstones from the cores of 50 wells drilled in three southern regions of the West Siberian Plate (Novosibirsk and Tomsk regions, Surgut region of the Khanty-Mansi Autonomous Area). The thermal conductivity of the samples was measured twice: in dry and in water-saturated states. It has been established that the thermal conductivity of water-saturated rocks is on average 20–40% higher. The thermal conductivities of dry and water-saturated samples show stable correlations between each other and with the sample porosity and permeability. These correlations can be used for the approximate estimation of the thermal conductivity of water-saturated rocks from the measured thermal conductivity of dry samples or even from the porosity values. The relationship between thermal conductivity and porosity can be used for the rapid assessment of rock porosity from the measured thermal conductivity of the core.

scholarly journals Refining Permeability Values for History-Matching of the Reservoir Simulation Model

2020 ◽  
Vol 20 (3) ◽  
pp. 223-230
Author(s):  
Margarita A. Smetkina ◽  
◽  
Oleg A. Melkishev ◽  
Maksim A. Prisyazhnyuk ◽  
◽  
...  
Keyword(s):  
Reservoir Simulation ◽  
History Matching ◽  
Simulation Models ◽  
Data Interpretation ◽  
Well Logging ◽  
Initial Permeability ◽  
Oil Field ◽  
Statistical Characteristics ◽  
Reservoir Model ◽  
Porosity And Permeability

Reservoir simulation models are used to design oil field developments, estimate efficiency of geological and engineering operations and perform prediction calculations of long-term development performances. A method has been developed to adjust the permeability cube values during reservoir model history-matching subject to the corederived dependence between rock petrophysical properties. The method was implemented using an example of the Bobrikovian formation (terrigenous reservoir) deposit of a field in the Solikamskian depression. A statistical analysis of the Bobrikovian formation porosity and permeability properties was conducted following the well logging results interpretation and reservoir modelling data. We analysed differences between the initial permeability obtained after upscaling the geological model and permeability obtained after the reservoir model history-matching. The analysis revealed divergences between the statistical characteristics of the permeability values based on the well logging data interpretation and the reservoir model, as well as substantial differences between the adjusted and initial permeability cubes. It was established that the initial permeability was significantly modified by manual adjustments in the process of history-matching. Extreme permeability values were defined and corrected based on the core-derived petrophysical dependence KPR = f(KP) , subject to ranges of porosity and permeability ratios. By using the modified permeability cube, calculations were performed to reproduce the formation production history. According to the calculation results, we achieved convergence with the actual data, while deviations were in line with the accuracy requirements to the model history-matching. Thus, this method of the permeability cube adjustment following the manual history-matching will save from the gross overestimation or underestimation of permeability in reservoir model cells.

scholarly journals Pengaruh Kelas Kemiringan Lereng dan Penggunaan Lahan terhadap Sifat Fisik Tanah di Kawasan Penyangga Waduk Cirata Kecamatan Cipeundeuy Kabupaten Bandung Barat

SoilREns ◽  
2016 ◽  
Vol 14 (1) ◽  
Author(s):  
Apong Sandrawati ◽  
Ade Setiawan ◽  
Gilang Kesumah
Keyword(s):  
Bulk Density ◽  
Power Plants ◽  
Water Reservoir ◽  
Physical Property ◽  
Analysis Data ◽  
Rubber Plantation ◽  
Landuse Change ◽  
Land Unit ◽  
Porosity And Permeability ◽  
Independent Variable

 Waduk Cirata  is  one of  impormant  water reservoir  in West  Java.  This  reservoir  was  used  for supporting  power plants  for Java  and Bali’s  area.  It’s  need  more attention  to  keep  the  function continuity  of  Waduk Cirata.  Greenbelt  area  was  one  of  factor determinant  for  establishment  of Waduk Cirata. Landuse change in greenbelt area is a great threat for greenbelt area sustainability, future more to establishment of Waduk Cirata. This research was aimed to study the effect of landuse and slope combination to physical property of soil. The research was conducted in greenbelt area of Waduk  Cirata,  located  in  Margalaksana  and Nenggeleng Village,  Cipeundeuy  District,  Bandung Barat.  The  independent  variable was  three landuse  type  and two  class  of  slope,  so  that  were six combination variable that repeated four times, so there was 24 land unit. This land unit determinedwith  overlay  tools  in ArcGIs software.  Statistical  analysis  used  for determined  the effect  andrelationship between parameter. Based on analysis data, combination of landuse type and class of slope not  influence  bulk density,  porosity,  and permeability  value.  Rubber plantation with  class  of slope 8-15%  has  higher bulk density  (1.24  g/cm3) and higher porosity  (66.7  %),  meanwhile,  the higher of permeability (9.31cm/hour) found in cocoa plantation with class of slope 16-25%.Keywords: greenbelt area, landuse, class of slope, bulk density, porosity, permeability.

scholarly journals Application of Micro-resistivity Scanning Imaging Logging Data in Reservoir Thickness Division

2021 ◽  
Vol 2076 (1) ◽  
pp. 012018
Author(s):  
Xinnan Wang
Keyword(s):  
Analysis Data ◽  
Core Analysis ◽  
The Core ◽  
Whole Process ◽  
New Interpretation ◽  
Scanning Imaging ◽  
Reservoir Description ◽  
Reservoir Parameter ◽  
Oilfield Development ◽  
Parameter Interpretation

Abstract Reservoir parameter interpretation is one of the main contents of reservoir description, which affects the whole process of oilfield development. According to the characteristics of micro-resistivity scanning imaging logging, which can directly reflect the changes of lithology and physical properties of reservoirs, this paper compares the thickness and interbed division of reservoirs with conventional logging data, this paper finds out the shortcomings of the conventional logging data in the interpretation of thickness and the division of interlayers, and combines the core analysis data to examine the differences in the correlation on the coring wells, and obtains good results, it has laid the foundation for the establishment of new interpretation procedure.

scholarly journals K-Mean Clustering Analysis and Logistic Boosting Regression for Rock Facies Characterization and Classification in Zubair Reservoir in Luhais Oil Field, Southern Iraq

2021 ◽  
Vol 54 (2B) ◽  
pp. 65-75
Author(s):  
Mohammed Albuslimi
Keyword(s):  
Water Saturation ◽  
Confusion Matrix ◽  
Well Logging ◽  
Oil Field ◽  
Core Analysis ◽  
Learning Approaches ◽  
Classification Rate ◽  
Lithofacies Classification ◽  
Core Description ◽  
Southern Iraq

Identifying rock facies from petrophysical logs is a crucial step in the evaluation and characterization of hydrocarbon reservoirs. The rock facies can be obtained either from core analysis (lithofacies) or from well logging data (electrofacies). In this research, two advanced machine learning approaches were adopted for electrofacies identification and for lithofacies classification, both given the well-logging interpretations from a well in the upper shale member in Luhais Oil Field, southern Iraq. Specifically, the K-mean partitioning analysis and Logistic Boosting (Logit Boost) were conducted for electrofacies characterization and lithofacies classification, respectively. The dataset includes the routine core analysis of core porosity, core permeability, and measured discrete lithofacies along with the well-logging interpretations include (shale volume, water saturation and effective porosity) given the entire reservoir interval. The K-Mean clustering technique demonstrated good matching between the vertical sequence of identified electrofacies and the observed lithofacies from core description as attained 89.92% total correct percent from the confusion matrix table. The Logit Boost showed excellent matching between the recognized lithofacies from the core description and the predicted lithofacies through attained 98.26% total correct classification rate index from the confusion matrix table. The high accuracy of the Logit Boost algorithm comes from taking into account the non-linearity between the lithofacies and petrophysical properties in the classification process. The high degree of lithofacies classification by Logit Boost in this research can be considered in a similar procedure at all sandstone reservoirs to improve the reservoir characterization. The complete facies identification and classification were implemented with the programming language R, the powerful open-source statistical computing language.

scholarly journals The Relationship between Diagenetic Evolution and Hydrocarbon Charge in Deep Tight Reservoirs: A Case Study from Kepingtage Formation of S9 Well Block in Tarim Basin

Geofluids ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-18
Author(s):  
Yukai Qi ◽  
Huixi Lin ◽  
Fushun Zhang ◽  
Xiuxiang Zhu ◽  
Hanwen Hu ◽  
...  
Keyword(s):  
Grain Size ◽  
Tarim Basin ◽  
Early Stage ◽  
Early Period ◽  
Physical Property ◽  
Late Period ◽  
Thin Sections ◽  
Porosity And Permeability ◽  
Diagenetic Evolution ◽  
The Relationship

The Silurian Kepingtage Formation of Tarim Basin is an important deep clastic reservoir. Exploration practice shows that the reservoirs are generally characterized by extremely low porosity and permeability, exhibiting strong mineral composition and physical property heterogeneities. The study of heterogeneity and its effect on oil charge is of great significance to the understanding of oil migration and accumulation in such reservoirs and thus is crucial to oil exploration. Therefore, based on identification and quantitative statistics of thin sections, SEM, and homogenization temperature measurements, this study was designed to examine the relationship between diagenetic evolution and oil emplacement in the Silurian Kepingtage Formation in S9 Block in Tarim Basin. The control of differential diagenesis and physical property evolution on oil charge process are discussed. It is found that the sandstones with fine grain size and high content of ductile grains (>20%) have experienced strong mechanical compaction, the porosity decreases rapidly in the early stage of burial. The densification process has been completed before the first period of oil charge so that no oil was found in the reservoir. In contrast, sandstones with relatively coarse grain size and low ductile grain content have better porosity and permeability properties, which are generally oil-bearing. This kind of sandstone generally experienced two periods of oil charge. Apart from moderate compaction, multiple diagenesis events were also observed, including quartz cementation, calcite cementation, and dissolution. Before the early period of oil charge, the diagenesis events are dominated by moderate compaction, chlorite cementation, and dissolution, and the reservoir property is still high. It seems that the time of late period oil charge is relatively long. With the growth of multiple types of authigenic minerals such as quartz, calcite, and illite after or sometimes synchronously occurred with the late period oil charge, the porosity gradually decreases.

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