本文選題：富油洼槽 + 成藏機(jī)理�。� 參考：《石油學(xué)報(bào)》2017年01期

【摘要】：隨著正向構(gòu)造帶勘探難度的增加,洼槽區(qū)逐漸成為渤海灣盆地富油凹陷增儲(chǔ)上產(chǎn)的重要領(lǐng)域,而成藏機(jī)理的特殊性制約了洼槽區(qū)勘探的深入。以冀中坳陷饒陽凹陷為研究對象,通過對洼槽生烴能力、油氣成藏時(shí)期、成藏動(dòng)阻力條件以及輸導(dǎo)體系等分析,探討了富油凹陷洼槽區(qū)油氣藏的形成機(jī)理及模式。研究表明,饒陽凹陷富油洼槽區(qū)有效生烴范圍大,熱演化程度較高,存在東營組沉積末期和新近紀(jì)明化鎮(zhèn)組沉積期2期主要生烴及成藏過程;東營組沉積末期油氣充注范圍較小,儲(chǔ)層物性好,成藏阻力小;而明化鎮(zhèn)組沉積充注時(shí)期,儲(chǔ)層物性差,成藏阻力大,但剩余壓力大,油氣成藏動(dòng)力強(qiáng)。洼槽中心區(qū)的油氣多沿源巖層系中的砂體、裂縫和小斷層等進(jìn)行短距離運(yùn)移聚集形成巖性為主的油氣藏;洼槽邊緣區(qū)往往發(fā)育深切入烴源巖的油源斷層,成為油氣垂向運(yùn)移的重要通道,油氣沿?cái)鄬舆\(yùn)移聚集形成構(gòu)造為主的油氣藏。富油洼槽區(qū)存在"源內(nèi)-兩期成藏-隱蔽輸導(dǎo)-短距離運(yùn)移"與"源外-單期成藏-斷裂輸導(dǎo)-垂向運(yùn)移"2種油氣成藏模式,成藏動(dòng)、阻力條件控制著洼槽區(qū)有效烴源巖層系內(nèi)油氣成藏的物性下限,而斷層為主體的輸導(dǎo)體系分布特征及有效性控制著洼槽區(qū)源外油氣的分布和富集程度。
[Abstract]:With the increasing difficulty of exploration in the forward structural zone, the depression area has gradually become an important field of increasing reservoir and production in the oil-rich depression of the Bohai Bay basin, and the particularity of the reservoir forming mechanism restricts the exploration of the depression area. Taking the Raoyang sag of Jizhong depression as the research object, the formation mechanism and model of oil and gas reservoirs in the trough area of rich oil depression are discussed by analyzing the hydrocarbon generation ability of the depression, the period of hydrocarbon accumulation, the conditions of the dynamic resistance of the reservoir formation and the transportation system. The results show that the range of effective hydrocarbon generation and thermal evolution in Youwa trough area of Raoyang depression are large and there are two main hydrocarbon generation and reservoir forming processes in the late sedimentary period of Dongying formation and the sedimentary period of Neogene Minghuazhen formation. At the end of Dongying formation, the oil and gas filling range is small, the reservoir physical property is good, and the reservoir forming resistance is small, while in Minghuazhen formation, the reservoir physical property is poor, the reservoir forming resistance is large, but the residual pressure is large, and the oil and gas reservoir forming power is strong. The oil and gas in the central area of the depression mainly migrate and gather along the sand bodies, fractures and small faults in the source rock series for short distance to form oil and gas reservoirs dominated by lithology, and oil source faults with deep cut into the source rock are often developed in the edge area of the depression trough. It is an important passage for vertical migration of oil and gas, and oil and gas accumulates along faults to form oil and gas reservoirs dominated by structure. There are two types of oil and gas accumulation models, I. e., in-source and two-stage pool-forming, subtle transportation-short-distance migration, and "extrasource-single-period pool-forming, fault-transportation-vertical migration" in the oil-rich depression area. The resistance condition controls the lower limit of physical properties of hydrocarbon reservoir formation in the effective source rock series in the depression area, while the distribution characteristics and validity of the fault system control the distribution and enrichment degree of the oil and gas outside the source.
【作者單位】： 中國石油華北油田公司;中國石油大港油田公司;中國石油大學(xué)地球科學(xué)與技術(shù)學(xué)院;
【基金】：中國石油天然氣集團(tuán)公司重大科技專項(xiàng)(2014E-35) 國家重大科技專項(xiàng)(2016ZX05006-003)資助
【分類號】：P618.13

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