Evolution and Hydrocarbon Accumulation of the Cambrian-Ordovician Paleo-uplifts in the Southwest Tarim Depression, China
محل انتشار: مجله علوم و فن آوری نفت، دوره: 11، شماره: 1
سال انتشار: 1400
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 75
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شناسه ملی سند علمی:
JR_JPSTR-11-1_005
تاریخ نمایه سازی: 30 آذر 1402
چکیده مقاله:
There is a close relationship between the evolution of the Cambrian–Ordovician paleo-uplifts and their hydrocarbon accumulation in the Southwest Tarim Depression. Using regional ۲D seismic data interpretation, the structural morphology of the top of the Ordovician carbonate rocks in the Southwest Tarim Depression at different historical geologic stages is mapped. Combined with analysis of the discovered oil and gas reservoirs, the regularity of the hydrocarbon distribution in the Southwest Tarim Depression is investigated. Research shows that the evolution of the Cambrian-Ordovician paleo-uplifts in the Southwest Tarim Depression can be divided into four stages: (۱) formation of the paleo-uplifts, (۲) steady subsidence of the eastern paleo-uplift, (۳) migration and adjustment of the western paleo-uplift and (۴) strong subsidence and extinction of the paleo-uplifts. The Cambrian-Ordovician strata in the Southwest Tarim Depression experienced a seesaw-like structural reconstruction from an early north-dipping slope to a late south-dipping slope. During the structural reconstruction process, a pivot zone was located at the position of the current Maigaiti Slope, proving favorable for hydrocarbon accumulation and preservation. The fault zones in the eastern and western paleo-uplifts of the Maigaiti slope finalized during the Late Hercynian Period were favorable to preserving paleo-oil reservoirs. In contrast, the fault zones in the northern margin of the Maigaiti Slope, where the current tectonic uplift is located, were favorable for the accumulation of gas reservoirs.
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نویسندگان
Lei Tian
Division of Chemical, Polymer and Petrochemical Technology Development, Research Institue of Petroleum Industry, Tehran, Iran
Jun Liu
Division of Chemical, Polymer and Petrochemical Technology Development, Research Institue of Petroleum Industry, Tehran, Iran
Qingzhou Yao
Division of Chemical, Polymer and Petrochemical Technology Development, Research Institue of Petroleum Industry, Tehran, Iran
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