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You are here: Home » Latest Issue » Volume 15, 2020 - Number 1 » DIFFERENTIAL INTERLAYER DEFORMATION AND ITS SIGNIFICANCE FOR HYDROCARBON ACCUMULATION IN THE TAZHONG AREA, TARIM BASIN, NW CHINA, Carpathian Journal of Earth and Environmental Sciences, February 2020, Vol. 15, No. 1, p. 113 - 125; DOI:10.26471/cjees/2020/015/114


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Fei NING1,2,3, Guangzhou MAO3, JinbiaoYUN1,2, Zhongpei ZHANG2 & Li DONG2
1Laboratory of Structural and Sedimentological Reservoir Geology, Exploration & Production Research Institute, SINOPEC, Beijing, China, 100083; *Corresponding author email address: ningfei037@aliyun.com
2Exploration& Production Research Institute, SINOPEC, Beijing, China, 100083;
3Shandong Provincial Key Laboratory of Depositional Mineralization & Sedimentary Minerals, Shandong University of Science and Technology, Qingdao, China, 266590


DIFFERENTIAL INTERLAYER DEFORMATION AND ITS SIGNIFICANCE FOR HYDROCARBON ACCUMULATION IN THE TAZHONG AREA, TARIM BASIN, NW CHINA, Carpathian Journal of Earth and Environmental Sciences, February 2020, Vol. 15, No. 1, p. 113 - 125; DOI:10.26471/cjees/2020/015/114

Full text

Abstract:

Differential interlayer deformation and structural coupling are the major characteristics of tectonic deformation in the Tazhong area. In this paper, the geometric characteristics and deformation mechanisms of faults in the Tazhong area were analyzed through a detailed interpretation of seismic sections, analysis of rock mechanical tests and application physical analog methods to gain a better understanding of the pattern of structural deformation in the Tazhong area. The deformation mechanism revealed in this paper also provides insights that will benefit the exploration of large hydrocarbon reserves in this area. It is proposed that the structural coupling effect in the area has typical “superimposed” characteristics. Deformation in the deep and intermediate layers and in the shallow layers is independent but exhibits certain similarities. The sandbox model of the study area revealed that there is a strong correlation between preexisting basement structures (basement uplifts and faults) and faults in the overlying layers. Because of the combined effects of basement structures and decollement layers, a fault is more likely to slip above the preexisting basement structures, thereby forming “superimposed” faults. Although the structural coupling effect can improve the diversity of trap styles and contributes to vertical hydrocarbon migration, the faulting associated with structural coupling also destroys the cap rocks, which is detrimental to hydrocarbon preservation.



Keyword: structural coupling; fault styles; differential structural deformation; mechanism of deformation; Tazhong area; Tarim Basin


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