本文選題：低滲透 + 湖底扇�。� 參考：《中國石油大學(華東)》2015年碩士論文

【摘要】：大蘆湖油田樊29塊為一深層構(gòu)造-巖性低滲透油藏,沙三中亞段4砂組是本區(qū)主要的含油層位,也是本次研究的目的層段。研究區(qū)地質(zhì)研究程度低,單砂體的沉積期次和沉積微相展布認識不清,沉積相模式尚有待落實,對儲層非均質(zhì)的研究少,上述問題導致研究區(qū)部分井注水開發(fā)效果差,研究區(qū)剩余油分布復雜。本文針對這些問題,綜合利用地震、測井及生產(chǎn)動態(tài)等資料,對目的層段沙三中亞段4砂組進行了精細地層劃分和對比,建立了4砂組小層等時劃分與對比格架;并在劃分出的4個小層內(nèi)識別出10期單砂體。沉積微相研究認為研究區(qū)沙三中亞段4砂組沉積時期主要發(fā)育湖底扇中扇及外扇亞相,并對中扇亞相進一步劃分了辮狀水道、水道間、朵葉體及席狀砂微相,其中辮狀水道和朵葉體微相較為發(fā)育,進一步闡明了各種沉積微相展布規(guī)律,并建立了研究區(qū)湖底扇沉積相模式。對研究區(qū)儲層特征進行了簡要論述,研究區(qū)屬于中孔低滲儲層,儲層的平面展布和物性分布均受控于沉積相帶的展布。通過定量求取儲層非均質(zhì)參數(shù)與隔夾層研究,以小層為單位,開展了儲層層內(nèi)、層間、平面非均質(zhì)研究,認為研究區(qū)4砂組43和45小層非均質(zhì)性較弱,42和44小層非均質(zhì)性較強�；趩紊绑w,建立了儲層精細地質(zhì)模型,包括構(gòu)造格架模型,精細單砂體模型,單砂體模型約束下的沉積微相模型以及油藏屬性模型。并對模型進行了地質(zhì)模型與概念模型對比驗證和概率分布一致性檢驗,結(jié)果表明所建立的地質(zhì)模型較可靠。結(jié)合數(shù)值模擬結(jié)果,對研究區(qū)剩余油分布和控制因素進行了研究。研究認為沉積微相、儲層非均質(zhì)性、微構(gòu)造和斷層、儲層孔隙結(jié)構(gòu)和流體性質(zhì)等地質(zhì)因素以及注采井網(wǎng)和射孔位置等開發(fā)因素共同影響著研究區(qū)剩余油的分布;總體上4砂組42和43小層剩余油富集,44小層和45小層分布相對集中。針對研究區(qū)存在的問題,提出了一些調(diào)整對策,包括井網(wǎng)優(yōu)化和完善注采井網(wǎng),劃分開發(fā)層系,以及補孔復射等措施,從而提高油田的開發(fā)效果。
[Abstract]:Fan 29 block in Daluhu Oilfield is a deep tectonic-lithologic low permeability reservoir. The 4 sand formation in the middle part of the third member of Sha is the main oil-bearing formation in this area, and is also the target layer of this study. In the study area, the degree of geological research is low, the sedimentary stage and distribution of sedimentary microfacies of single sand body are not clear, the sedimentary facies model is still to be implemented, and the research on reservoir heterogeneity is few. These problems lead to poor water injection development effect in some wells in the study area. The distribution of remaining oil in the study area is complex. Aiming at these problems, this paper makes comprehensive use of seismic, well logging and production performance data, carries on fine stratigraphic division and correlation to 4 sand formation in the middle part of Sha 3 in the target formation, and sets up the isochronous division and correlation framework of 4 sand formation. The single sand bodies of 10 phases were identified in the 4 sublayers. The sedimentary microfacies study shows that the subfacies of sublacustrine fan and outer fan are mainly developed in the sedimentary period of the 4th sand formation in the middle part of the study area, and the subfacies of the middle fan are further divided into braided channel, watercourse, flower leaf body and sheet sand microfacies. The microfacies of braided waterway and flower leaf body are relatively developed. The distribution law of various sedimentary microfacies is further clarified and the sedimentary facies model of sublacustrine fan in the study area is established. The reservoir characteristics of the study area are briefly discussed. The study area belongs to the middle porosity and low permeability reservoir, and the distribution of the plane distribution and physical properties of the reservoir is controlled by the distribution of the sedimentary facies belt. Based on the quantitative study of reservoir heterogeneity parameters and intercalation, and taking the small layers as the unit, the heterogeneity of reservoir layer, interlayer and plane is studied. It is considered that the heterogeneity of 4 sand groups 43 and 45 in the study area is stronger than that of the weak layers 42 and 44. Based on single sand body, the fine geological model of reservoir is established, including structural framework model, fine single sand body model, sedimentary microfacies model constrained by single sand body model and reservoir attribute model. The geological model is compared with the conceptual model and the consistency of probability distribution is verified. The results show that the geological model is reliable. Combined with the numerical simulation results, the remaining oil distribution and control factors in the study area were studied. It is considered that sedimentary microfacies, reservoir heterogeneity, microstructures and faults, pore structure and fluid properties of reservoir, and development factors such as injection-production pattern and perforation location affect the distribution of remaining oil in the study area. On the whole, the remaining oil of 4 sand formation 42 and 43 are concentrated relatively. In view of the problems existing in the study area, some adjustment countermeasures are put forward, including optimizing and perfecting the injection-production well pattern, dividing the development layer, and filling the hole and reshooting, so as to improve the development effect of the oil field.
【學位授予單位】：中國石油大學(華東)
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TE327

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本文編號：2002305