發(fā)布時(shí)間：2018-07-06 12:31

  本文選題：斷裂演化 + 斷層封閉性�。� 參考：《石油與天然氣地質(zhì)》2017年05期

【摘要】：尼日爾三角洲深水區(qū)E油田背斜頂部發(fā)育大量密集斷層,多數(shù)斷層傾向一致呈多米諾式排布,活動(dòng)機(jī)制和期次不清楚,對(duì)油水的分隔作用不明確�；跇�(gòu)造解析思想,通過構(gòu)造平衡剖面和古構(gòu)造圖回剝技術(shù)研究E背斜的軸面遷移過程,結(jié)合斷裂成核理論明確斷裂活動(dòng)期次和機(jī)制,進(jìn)而劃分?jǐn)嗔严到y(tǒng),指導(dǎo)斷裂的封閉性評(píng)價(jià)。提出深水背斜頂部正斷層重力滑動(dòng)的演化機(jī)制,確定多米諾式正斷層與背斜軸面遷移的多期次對(duì)應(yīng)關(guān)系。E構(gòu)造共分為4個(gè)演化階段,發(fā)育7類斷裂系統(tǒng),其中三個(gè)期次的重力滑動(dòng)斷階(階梯式)斷層為本區(qū)獨(dú)有的特殊構(gòu)造,在古背斜背景下受控于重力作用變形。逆沖斷層和多期活動(dòng)斷層的封閉趨勢強(qiáng),重力滑動(dòng)斷階斷層具有潛在封閉性,而晚期伸展斷層不具有封閉能力,篩選出16條潛在封閉斷層。確定本區(qū)斷層弱封閉SGR臨界值為8%,完全封閉臨界值為20%,評(píng)價(jià)結(jié)果顯示:其中8條斷層完全封閉,能夠?qū)鄬觾杀P分隔為不同油水單元,4條斷層具有弱封閉能力,不分隔油水,僅影響注水受效,從而指導(dǎo)油田的鉆井和注采方案設(shè)計(jì)。
[Abstract]:There are a large number of dense faults in the top of E oilfield anticline in the deep water area of Niger Delta. Most faults tend to be domino arrangement. The mechanism and stage of activity are not clear and the separation of oil and water is not clear. Based on the idea of structural analysis, the axial migration process of E anticline is studied by structural equilibrium section and paleotectonic map backstripping technique. Combined with the theory of fault nucleation, the time and mechanism of fault activity are determined, and the fault system is further divided. To guide the sealing evaluation of faults. The evolution mechanism of gravity slip of normal fault at the top of deep water anticline is put forward. It is determined that the corresponding relationship between domino normal fault and backslope plane migration is divided into four stages, and 7 types of fault systems are developed. The gravimetric slip fault (step type) fault in three periods is a special structure in this area, which is controlled by gravity deformation in the paleo-anticline background. The thrust fault and multi-stage active fault have strong sealing tendency, the gravimetric slip fault has potential sealing property, but the late extensional fault has no sealing ability, 16 potential sealing faults have been screened out. It is determined that the critical value of SGR for weak sealing of faults in this area is 8 and the critical value for complete sealing is 20. The evaluation results show that 8 faults are completely closed and 4 faults can be separated into different oil-water units with weak sealing ability and no separation of oil and water. Only the effect of water injection is affected to guide the design of drilling and injection-production schemes in oil fields.
【作者單位】： 東北石油大學(xué)CNPC斷裂控藏研究室;黑龍江省科技創(chuàng)新團(tuán)隊(duì)"斷裂變形封閉性及流體運(yùn)移";東北石油大學(xué)非常規(guī)油氣成藏與開發(fā)省部共建國家重點(diǎn)實(shí)驗(yàn)室培育基地;中國石油華北油田公司勘探開發(fā)研究院;中海油研究總院;
【基金】：國家自然科學(xué)基金項(xiàng)目(41572127,41502136) 中國石油天然氣股份有限公司重大科技項(xiàng)目(2016D-0702)
【分類號(hào)】：P618.13

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