The heterogeneity of petrophysical and elastic properties in carbonate rocks controlled by strike-slip fault: A case study from yangjikan outcrop in the tarim basin

被引:9
作者
Gong, Fei [1 ,2 ]
Song, Yichen [2 ]
Zeng, Lianbo [2 ]
Zou, Guangui [1 ]
机构
[1] China Univ Min & Technol, Coll Geosci & Surveying Engn, Beijing, Peoples R China
[2] China Univ Petr, State Key Lab Petr Resources & Prospecting, Beijing, Peoples R China
来源
GEOENERGY SCIENCE AND ENGINEERING | 2023年 / 220卷
关键词
Carbonate outcrops; Strike -slip fault; The pore network architectures; Petrophysical and elastic properties; Heterogeneity; TAHE OIL-FIELD; DAMAGE ZONES; ACOUSTIC PROPERTIES; PORE STRUCTURE; CLASSIFICATION; ARCHITECTURE; PREDICTION; RESERVOIRS; EXAMPLES; POROSITY;
D O I
10.1016/j.petrol.2022.111170
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
The petrophysical and elastic properties of the carbonate rocks controlled by strike-slip fault are still poor understood due to their significant complexities and strong heterogeneities, causing challenges for the exploitation and development of these carbonate reservoirs. To better comprehend the heterogeneity of petrophysical and elastic properties of the fault-controlled carbonate rocks, a small carbonate strike slip fault zone is selected, which is located in Yangjikan section in the Tarim basin. We combine the geostatistical, microscopic observation, petrophysical and ultrasonic analyses to characterize and understand the complexities and heterogeneity of petrophysical and elastic properties with different distance to the main fault core. The results show significant complexities and heterogeneities of petrophysical and elastic properties, and the variations of rocks drilled from the fault core are relatively drastic compared to those from the damage zone. The equivalent pore aspect ratios of the rocks are calculated from the differential effective medium theory, the values in the fault core are much higher compared to those from the damage zone, which can discriminate the pore network architectures and can represent reference for determination of the boundary of fractured damage zone. The controlling factors on the heterogeneity of the petrophysical and elastic properties for the selected fault zone are discussed, which mainly include the influence of fault structure position on fracture development, fluid selective filling on effective fracture and pore development, and the sequence on pore development. The results can contribute to the recognition and prediction of the petrophysical and elastic properties and hydrocarbon exploration in carbonate strike-slip fault zone in the Tarim Basin, and can provide reference for the construction of integrate multiscale heterogeneities models.
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页数:15
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