Characteristics of boundary fault systems and its hydrocarbon controlling on hydrocarbon accumulation in Awati Sag,Tarim Basin,China |
| |
| Institution: | 1. Oil and Gas Survey, China Geological Survey, Ministry of Natural Reources, Beijing 100083, China;2. School of Earth Science, China University of Petroleum, Beijing 102249, China;3. Oil Production Plant of East China Branch, SINOPEC, Taizhou 225300, China;4. China Geological Survey, Ministry of Natural Reources, Beijing 100037, China;5. Research Institute of Petroleum Exploration and Development, Tarim Oilfield Company, Petro China, Korla 841000, China;6. Bohai Oilfield Exploration and Development Research Institute of CNOOC Corporation Limited-Tianjin, Tianjin 300452, China |
| |
| Abstract: | Based on the interpretation of two-dimensional seismic data, this paper analyzes the characteristics of three boundary fault systems including the Shajingzi fault, the Aqia fault and the Tumuxiuke fault around the Awati sag of the Tarim Basin, and studies its controlling on hydrocarbon accumulation. Neotectonic movement is ubiquitous in oil and gas bearing basins in China, such as Neogene intense activities of large boundary thrusting faults of the Awati sag: Shajingzi fault, Aqia fault and Tumuxiuke fault. Based on a large number of seismic data, it is showed that they have section wise characteristics in the direction of fault strike, and active periods and associated structures formed of different sections are different. Usually, large anticlinal structures are formed in the upper wall, and faulted anticline controlled by companion faults are formed in the bottom wall. Large faults cut the strata from Cambrian up to Neogene. For the anticline in the upper wall, fault activities caused by neotectonic movement played a destructive role in hydrocarbon accumulation, thus the preservation condition is critical for reservoir formation. In this sense, attention should be paid to formations in the upper walls of Aqia fault and Tumuxiuke fault under the Cambrian salt bed, whose plastic deformation could help to heal faults. Companion faults in the bottom wall cut down to the Cambrian and up to the Triassic serving as the pathway for hydrocarbon migration, and associated structures in the bottom wall are noteworthy exploration targets.©2019 China Geology Editorial Office. |
| |
| Keywords: | Neotectonic movement Boundary fault Reservoir forming control Awati sag Tarim Basin |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
