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Vertical migration through faults and hydrocarbon accumulation patterns in deepwater areas of the Qiongdongnan Basin 被引量:4
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作者 WANG Zhenfeng LIU Zhen +4 位作者 CAO Shang SUN Zhipeng ZUO Qianmei WANG Yahui HE Weijun 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2014年第12期96-106,共11页
In the Qiongdongnan Basin, faults are well developed.Based on the drilling results, the traps controlled two or more faults are oil-rich. However, when only one fault cut through the sand body, there is no sign for hy... In the Qiongdongnan Basin, faults are well developed.Based on the drilling results, the traps controlled two or more faults are oil-rich. However, when only one fault cut through the sand body, there is no sign for hy-drocarbon accumulation in the sandstone. In terms of this phenomenon, the principle of reservoir-forming controlled by fault terrace is proposed, i.e., when the single fault activates, because of the incompressibility of pore water, the resistance of pore and the direction of buoyancy, it is impossible for hydrocarbon to ac-cumulate in sandstone. But when there are two or more faults, one of the faults acts as the spillway so the hydrocarbon could fill in the pore of sandstone through other faults. In total five gas bearing structures and four failure traps are considered, as examples to demonstrate our findings. According to this theory, it is well-advised that south steep slope zone of Baodao-Changchang Depression, south gentle slope zone of Lingshui Depression, north steep slope zone of Lingshui Depression, and north steep slope zone of Baodao Depression are the most favorable step-fault zones, which are the main exploration direction in next stage. 展开更多
关键词 principle of reservoir-forming controlled by fault terrace gas bearing structures step-fault zone Qiongdongnan Basin
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