本文關(guān)鍵詞：強(qiáng)底水礁灰?guī)rL油藏水平井開發(fā)影響因素及效果評(píng)價(jià)研究　出處：《西南石油大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 礁灰?guī)r 數(shù)值模擬 采收率影響因素 動(dòng)態(tài)分析 開發(fā)效果評(píng)價(jià)

【摘要】：L油田是我國最大的大型強(qiáng)底水塊狀生物灰?guī)r油田,儲(chǔ)層裂縫、溶孔發(fā)育并被斷層復(fù)雜化,具有相對(duì)致密、致密裂縫、孔隙孔洞和孔洞裂縫多種復(fù)雜儲(chǔ)層類型。自1996年3月采用放射狀水平井網(wǎng)投產(chǎn)以來,油田含水上升迅速,產(chǎn)量遞減快,開發(fā)效果不理想。2010年～2016年期間,綜合含水維持在95-98%之間,但截止2016年12月的采出程度僅11.51%。在已經(jīng)投產(chǎn)的油井中,不同區(qū)域的油井含水上升速度存在明顯差異,側(cè)鉆調(diào)整井效果不盡人意,且效果越來越差。因此,明確影響水平井開發(fā)動(dòng)態(tài)的主控因素,對(duì)油田開發(fā)效果作出正確評(píng)價(jià),對(duì)決策油田開發(fā)后期調(diào)整措施,改善油田開發(fā)效果具有重要的意義。本文在詳細(xì)分析總結(jié)L油藏地質(zhì)特征基礎(chǔ)上,針對(duì)油藏開發(fā)中存在的問題,主要開展了以下研究并取得了相應(yīng)的研究成果:(1)采用數(shù)值模擬方法,系統(tǒng)分析了影響L油藏開發(fā)效果的各個(gè)因素,獲得了采收率與各因素的變化規(guī)律及函數(shù)關(guān)系式。(2)利用正交優(yōu)化設(shè)計(jì)實(shí)驗(yàn)方法,研究了多因素共同作用下,各因素對(duì)采收率的影響程度,并運(yùn)用matlab編程回歸得到了強(qiáng)底水裂縫發(fā)育型與裂縫不發(fā)育型油藏采收率與各因素間的定量表征模型,提出了適合L油藏的、考慮儲(chǔ)層縱向非均質(zhì)性情況的采收率預(yù)測(cè)計(jì)算方法。(3)結(jié)合目標(biāo)油田實(shí)際地質(zhì)特征,分析了水平井生產(chǎn)動(dòng)態(tài)特征及其產(chǎn)生的機(jī)理,為油田后續(xù)調(diào)整井布井、生產(chǎn)措施調(diào)整提供了依據(jù)。(4)依據(jù)生產(chǎn)動(dòng)態(tài)分析結(jié)果,在對(duì)水平井控制區(qū)域儲(chǔ)層類型歸類的基礎(chǔ)上,建立了適合于強(qiáng)底水礁灰?guī)r油藏的開發(fā)效果評(píng)價(jià)關(guān)鍵指標(biāo)體系,并對(duì)四種儲(chǔ)層類型水平井的開發(fā)效果進(jìn)行分類評(píng)價(jià)。(5)基于開發(fā)效果分類評(píng)價(jià)結(jié)果和生產(chǎn)動(dòng)態(tài)分析結(jié)果,結(jié)合儲(chǔ)層沿水平井段強(qiáng)非均質(zhì)性特點(diǎn),提出了改善L油田開發(fā)現(xiàn)狀目前可行的調(diào)整措施為"對(duì)水平井段采用分段定最大流量、并盡量增大生產(chǎn)壓差的方法,以提高水平井內(nèi)低滲段的原油動(dòng)用程度,達(dá)到降水增油的效果",并通過數(shù)值模擬方法驗(yàn)證了該措施的有效性。
[Abstract]:L oil field is the largest large bioglore oilfield with strong bottom water block in China. The reservoir fractures, dissolved pores and complicated by faults, are relatively compact and tight fractures. Since the radial horizontal well pattern was put into operation in March 1996, the water cut in the oilfield has risen rapidly and the production has decreased rapidly. From 2010 to 2016, the comprehensive water content was kept between 95% and 98%. However, as of December 2016, the recovery degree is only 11.51%. In the wells that have already been put into production, there are obvious differences in the water cut rise rate in different areas, and the effect of sidetracking adjustment wells is not satisfactory. And the effect is getting worse and worse. Therefore, the main control factors that affect the development performance of horizontal wells are defined, the development effect of oil field is evaluated correctly, and the adjustment measures for the later stage of oilfield development are made. It is of great significance to improve the development effect of oil field. Based on the detailed analysis and summary of geological characteristics of L reservoir, this paper aims at the problems existing in reservoir development. The following research has been carried out and the corresponding research results have been obtained. (1) numerical simulation method has been used to systematically analyze the factors that affect the development effect of L reservoir. The variation law of oil recovery and various factors and its function relation are obtained. (2) by means of orthogonal optimum design method, the influence degree of each factor on recovery is studied under the joint action of many factors. Using matlab programming regression, the quantitative characterization model of oil recovery and various factors in the reservoirs of strong bottom water fracture development and fracture undeveloped is obtained, and the suitable L reservoir is put forward. Considering the reservoir longitudinal heterogeneity, the method of oil recovery prediction and calculation. (3) combined with the actual geological characteristics of the target oil field, the production dynamic characteristics of horizontal well and its production mechanism are analyzed, which is the follow-up adjustment of well layout in oil field. The adjustment of production measures provides the basis for the analysis of production performance and classifies the reservoir types in the horizontal well control area. The key index system for evaluation of development effect of strong bottom water reef limestone reservoir is established. And the development effect of four reservoir types horizontal wells are classified and evaluated. (5) based on the development effect classification evaluation results and production performance analysis results, combined with the reservoir along the horizontal well Duan Qiang heterogeneity characteristics. The feasible adjustment measures to improve the present development situation of L oilfield are put forward: "adopting the method of determining the maximum flow rate in the horizontal well section and increasing the production pressure difference as far as possible, in order to improve the crude oil production degree of the low permeability section in the horizontal well." The effectiveness of the method is verified by numerical simulation.
【學(xué)位授予單位】：西南石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TE243

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