本文選題：沉積微相 + 儲(chǔ)層特征�。� 參考：《西安石油大學(xué)》2015年碩士論文

【摘要】：鹽67區(qū)位于鄂爾多斯盆地陜北斜坡中段姬塬油田。該區(qū)長(zhǎng)8儲(chǔ)層于2012年5月投產(chǎn),實(shí)行了超前注水政策,但是開發(fā)初期產(chǎn)量遞減較快,提高注水強(qiáng)度后沒有明顯見效跡象,而且在開發(fā)過程中,注水壓力不斷升高,出現(xiàn)了高壓欠注的問題。為了制定一套合理的注水穩(wěn)產(chǎn)方案,必須對(duì)其儲(chǔ)層特征及井間連通性進(jìn)行研究。本文首先通過巖心分析及測(cè)井資料,結(jié)合前人的研究成果對(duì)研究區(qū)長(zhǎng)8儲(chǔ)層小層進(jìn)行了劃分,并對(duì)沉積微相、儲(chǔ)層特征及非均質(zhì)性進(jìn)行了研究,在此基礎(chǔ)上對(duì)研究區(qū)長(zhǎng)8儲(chǔ)層進(jìn)行了注采井間砂體連通性的研究,并結(jié)合射孔資料,通過油層連通柵狀圖,井組水驅(qū)控制程度及連通阻力系數(shù)對(duì)研究區(qū)長(zhǎng)8儲(chǔ)層注采井間靜態(tài)連通性進(jìn)行了定性和定量描述。通過注采生產(chǎn)動(dòng)態(tài)數(shù)據(jù)反演連通性的兩種方法計(jì)算了各注采井間的連通系數(shù),分析對(duì)比了兩種方法得出的連通系數(shù),對(duì)其歸一化,作為動(dòng)態(tài)連通系數(shù)來定量描述注采井間的動(dòng)態(tài)連通程度,最后對(duì)影響井間連通性的因素及改善措施進(jìn)行了分析。在井間連通性研究的基礎(chǔ)上,結(jié)合生產(chǎn)動(dòng)態(tài)曲線,以井組為單位進(jìn)行了注采關(guān)系精細(xì)描述,并提出針對(duì)性的建議和措施。通過系統(tǒng)地研究,取得如下認(rèn)識(shí):研究區(qū)長(zhǎng)8儲(chǔ)層靜態(tài)連通性較好,但是動(dòng)態(tài)連通性整體較差,其主要是由于儲(chǔ)層自身物性較差及地層堵塞所致。儲(chǔ)層連通性差、注采不完善及儲(chǔ)層非均質(zhì)性導(dǎo)致的吸水剖面不均,是造成注水見效不明顯,注水壓力升高的主要因素。
[Abstract]:Yan67 area is located in Jiyuan oil field in the middle section of northern Shaanxi slope in Ordos Basin. The Chang 8 reservoir in this district was put into production in May 2012, and implemented the policy of ahead water injection, but the production decreased rapidly in the initial stage of development, and there was no obvious sign of effect after increasing the water injection intensity, and the water injection pressure was rising continuously during the development process. There is a problem of high pressure underinjection. In order to make a reasonable water injection stable production plan, it is necessary to study the reservoir characteristics and inter-well connectivity. In this paper, the core analysis and logging data are used to divide the Chang 8 reservoir layers in the study area, and the sedimentary microfacies, reservoir characteristics and heterogeneity are studied. On the basis of this, the connectivity of sand body between injection-production wells in Chang8 reservoir is studied, and combined with perforation data, the connected grid diagram of oil layer is adopted. The static connectivity between injection and production wells in Chang8 reservoir is described qualitatively and quantitatively by the control degree of water drive and the coefficient of connectivity. Through two methods of inversion connectivity of injection-production dynamic data, the connectivity coefficient of each injection-production well is calculated, the connectivity coefficient obtained by the two methods is analyzed and compared, and the connectivity coefficient is normalized. As a dynamic connectivity coefficient, the dynamic connectivity between injection-production wells is quantitatively described. Finally, the factors affecting inter-well connectivity and the improvement measures are analyzed. On the basis of the research of inter-well connectivity and combined with the production dynamic curve, the injection-production relationship is described in detail by taking the well group as the unit, and the corresponding suggestions and measures are put forward. Through systematic research, the following conclusions are obtained: the static connectivity of Chang8 reservoir is good, but the dynamic connectivity is poor as a whole, which is mainly caused by the poor physical properties of the reservoir itself and the formation plugging. Poor reservoir connectivity, imperfect injection-production and uneven water absorption profile due to reservoir heterogeneity are the main factors that cause the water injection effect is not obvious and the water injection pressure increases.
【學(xué)位授予單位】：西安石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：P618.13

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本文編號(hào)：1932931