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.

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.

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.

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 Resolved stress analysis, failure mode, and fault-controlled fluid conduits in low-permeability strata

2020 ◽  
Author(s):  
David A. Ferrill ◽  
Kevin J. Smart ◽  
Alan P. Morris
Keyword(s):  
Failure Mode ◽  
Failure Modes ◽  
Oil And Gas ◽  
Deformation Behaviour ◽  
Low Permeability ◽  
Mechanical Stratigraphy ◽  
Slip Tendency ◽  
Oil And Gas Reservoir ◽  
The Relationship ◽  
Deformation Modes

Abstract. Failure behaviour can strongly influence deformation-related changes in volume, which is critical in the formation of fault and fracture porosity and conduit development in low permeability rocks. This paper explores the failure modes and deformation behaviour of faults within the mechanically layered Eagle Ford Formation, an ultra-low permeability self-sourced oil and gas reservoir and aquitard exposed in natural outcrop in southwest Texas, USA. Particular emphasis is placed on analysis of the relationship between slip versus opening along fault segments, and the associated variation in dilation tendency versus slip tendency. Results show that the failure mode and deformation behaviour (dilation versus slip) relate in predictable ways to the mechanical stratigraphy, stress field, and specifically the dilation tendency and slip tendency. We conclude that dilation tendency versus slip tendency patterns on faults and other fractures can be analysed using detailed orientation or structural geometry data and stress information, and employed predictively to interpret deformation modes and infer volume change and fluid conduit versus barrier behaviour of structures.

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.

The High Resolution Three Lateral Logging Response Research Based on MATLA

2011 ◽  
Vol 130-134 ◽  
pp. 1556-1559
Author(s):  
Ze Xi Han ◽  
Ya Ni Li ◽  
Jie Wu
Keyword(s):  
High Resolution ◽  
Oil And Gas ◽  
Measuring Method ◽  
Finite Element Program ◽  
Element Program ◽  
Formation Resistivity ◽  
Resistivity Logging ◽  
And Control ◽  
Oil And Gas Reservoir ◽  
The Relationship

The formation resistivity is a main parameter in logging interpretation and evaluation of oil and gas reservoir. And high resolution three-lateral logging is an important measuring method in resistivity logging. According to the present finite element program for three lateral logging concludes data and the powerful graphics capabilities of MATLAB, we study the relationship between potential or current and focusing characteristics. The results are important for how to design equipment parameters, and control the current focus to achieve the best focusing.

Study on the Application of the EPSTM Image Based Post-Stack Spectrum Imaging to the Identification of the Riverway Sand Bodies in Fuyang Oil Layer of Songliao Basin

2013 ◽  
Vol 443 ◽  
pp. 668-674
Author(s):  
Chun Rui Chen ◽  
Xin Rong Zhang ◽  
Jin Ping Liu ◽  
Shi Fang
Keyword(s):  
Relative Error ◽  
Oil And Gas ◽  
Statistical Error ◽  
Oil Field ◽  
Gas Reservoir ◽  
Sand Body ◽  
Spectrum Imaging ◽  
Anisotropic Reservoirs ◽  
Oil And Gas Reservoir ◽  
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. To accurately describe the reservoir, a post-stack spectrum imaging was made for the identification of the riverway sand bodies in Fuyang oil layer using EPSTM image in the study area. The statistical error of the riverway sand body identification result using post-stack spectrum imaging was small if the sandstone thickness was greater than 3m. Seen from logging wells geological verification, the riverway identification fit rate was 81.6% on average, the microfacies type identification fit rate was 75%, and the microfacies types identification fit rate of the sandstone thicker than 3m was 80%. Using the nonlinear algorithm of the MDI software, the lithologic prediction was implemented based on the sand group as the unit, and the average prediction fit rate of the sandstone thicker than 3m reached 90% according to the standard relative error less than 20%. Therefore, the post-stack spectrum imaging can exert a significant effect for the anisotropic reservoirs of complex later-period structure, thin sand body, and complex changes, and can meet the needs of the oil field exploration and development to some extent.

Study on the hydrocarbon accumulation models of the upper Es3 in the gentle slope belt of Chexi Depression

2020 ◽  
Author(s):  
Shan Zhao ◽  
Hua Liu
Keyword(s):  
Oil And Gas ◽  
Controlling Factors ◽  
Source Rocks ◽  
Hydrocarbon Accumulation ◽  
Gas Reservoir ◽  
Sand Body ◽  
Main Controlling Factors ◽  
Two Stages ◽  
Oil And Gas Reservoir ◽  
Sand Bodies

<p>Based on the analysis of hydrocarbon source, reservoir forming period, composition and classification of transportation system, and the reasons of failure well in Chexi Depression of Bohai Bay Basin，Two types of hydrocarbon accumulation models in gentle slope belt of Chexi area are established and the main controlling factors of hydrocarbon accumulation are defined. There are three sets of source rocks（Es1、middle and lover submember of Es3、Es4）in Chexi area, the different strata of source rocks have great differences in the Pr/Ph and the content of gammacerane. It has been found that the crude oil of Es3 has a good geochemical correspondence with the middle and lower of Es3 source rocks, and has the characteristics of near source accumulation. The hydrocarbon accumulation in the study area exists in the sedimentary period of the Dongying formation and the sedimentary period of the Guantao formation to the present two stages, which is dominated by late filling. There are two stages of oil and gas filling in the inner and middle belts, and only late stage hydrocarbon filling in the outer slope belt. The hydrocarbon transportation system is mainly composed of faults and sand bodies. The effective source rocks in the middle and lover submember of Es3 are connected with the upper reservoir of Es3 in a small area, which can be directly migrated to the upper sandstone reservoir of Es3 to form lithologic oil and gas reservoir. However, most of the oil and gas in the upper Es3 reservoir need to be vertically migrated by means of oil source fault, and then through the contact of sand bodies such as main channel and fan body, the main oil and gas reservoir will gradually move up with the distance from the source rock. The area with direct contact source reservoir configuration relationship is a "sand body lateral migration" reservoir formation mode, and the main controlling factors of reservoir formation are sand body connectivity and reservoir porosity and permeability. The source reservoir configuration area with fault connection type is a "fault sand combination T-type migration" reservoir forming mode, and the main controlling factors of reservoir forming are migration convergence facies (structural ridge and cross-section ridge).The area of passive reservoir contact is "fault sand combination step migration" reservoir forming mode, and the main controlling factors of reservoir forming are migration convergence facies (structural ridge) and lateral sealing of faults in preservation conditions.</p><p>Key words: Chexi Depression; Source of hydrocarbon; Accumulation period; Fault sand transport combination; Reservoir forming mode</p>

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.

scholarly journals Resolved stress analysis, failure mode, and fault-controlled fluid conduits

Solid Earth ◽  
2020 ◽  
Vol 11 (3) ◽  
pp. 899-908
Author(s):  
David A. Ferrill ◽  
Kevin J. Smart ◽  
Alan P. Morris
Keyword(s):  
Failure Mode ◽  
Deformation Behavior ◽  
Failure Modes ◽  
Oil And Gas ◽  
Low Permeability ◽  
Mechanical Stratigraphy ◽  
Slip Tendency ◽  
Oil And Gas Reservoir ◽  
The Relationship ◽  
Deformation Modes

Abstract. Failure behaviors can strongly influence deformation-related changes in volume, which are critical in the formation of fault and fracture porosity and conduit development in low-permeability rocks. This paper explores the failure modes and deformation behavior of faults within the mechanically layered Eagle Ford Formation, an ultra-low permeability self-sourced oil and gas reservoir and aquitard exposed in natural outcrop in southwest Texas, USA. Particular emphasis is placed on analysis of the relationship between slip versus opening along fault segments and the associated variation in dilation tendency versus slip tendency. Results show that the failure mode and deformation behavior (dilation versus slip) relate in predictable ways to the mechanical stratigraphy, stress field, and specifically the dilation tendency and slip tendency. We conclude that dilation tendency versus slip tendency patterns on faults and other fractures can be analyzed using detailed orientation or structural geometry data and stress information and employed predictively to interpret deformation modes and infer volume change and fluid conduit versus barrier behavior of structures.

Sign in / Sign up

Export Citation Format

Share Document