【摘要】：隨著我國常規(guī)油藏的開發(fā)步入中后期以及油藏開發(fā)技術的不斷提高,低滲透、超低滲透油藏的勘探和開發(fā)已經(jīng)成為中國石油工業(yè)可持續(xù)發(fā)展的重要保障。但是開發(fā)時存在開發(fā)難、成本高等問題,因此開發(fā)低滲透油藏技術顯得更為重要。 BMN區(qū)屬于典型的巖性油氣藏,平均滲透率為1.34mD,本文以長81層段為研究的目的層段,以石油地質學、油藏開發(fā)技術等為理論基礎,結合該區(qū)塊的現(xiàn)場資料、地質建模以及數(shù)值模擬對研究區(qū)塊進行啟動壓力梯度、合理井距、排距、井網(wǎng)密度、井網(wǎng)適應性評價、注水開發(fā)等研究。 本論文的重點是對BMN區(qū)進行井網(wǎng)加密研究,在精細的地質建模和油藏工程的基礎上,以油藏數(shù)值模擬方法為研究手段,對油藏工程研究提出的調整措施,進行對比分析與論證,優(yōu)選出適合本油田開發(fā)的加密井網(wǎng)調整開發(fā)方案。本文設計了3類加密方案：第一類方案的加密方式是在油井排兩口油井之間加密一口水井,提高動用程度。第二類方案是在注水井周圍加密四口井,在水井與側向井中間位置加密四口油井,提高側向上的動用程度。第三類方案是在前期合理排距研究的基礎上縮小井排排距,加密井也處在水井與側向井的中間位置,提高側向區(qū)域的動用程度。通過數(shù)值模擬對開發(fā)指標進行對比,優(yōu)選出最佳井網(wǎng)加密方案。最優(yōu)加密方案是排距縮小為110m的加密形式,加密井數(shù)296口,采出程度為18.48%。
[Abstract]:With the development of conventional reservoirs and the continuous improvement of reservoir development technology in China, the exploration and development of low permeability and ultra-low permeability reservoirs has become an important guarantee for the sustainable development of China's petroleum industry. However, the development of low permeability reservoir technology is more important because it is difficult to develop, high cost and so on. The BMN area is a typical lithologic reservoir with an average permeability of 1.34mD. this paper takes Chang81 formation as the target interval, takes petroleum geology and reservoir development technology as the theoretical basis, and combines the field data of the block. Geological modeling and numerical simulation are used to study the starting pressure gradient, reasonable well spacing, row spacing, well pattern density, well pattern adaptability evaluation, water injection development and so on. The emphasis of this paper is to carry out well pattern infill research in BMN area. On the basis of fine geological modeling and reservoir engineering, the adjustment measures proposed in reservoir engineering research are analyzed and proved by using reservoir numerical simulation method as research means. The scheme of adjustment and development of infill well pattern suitable for the development of this oil field is selected. In this paper, three kinds of infilling schemes are designed: the first one is to infill a well between two wells in order to improve the production degree. The second scheme is to infill four wells around the injection wells and four wells in the middle of the wells and sideways to improve the production degree of the sideways. The third scheme is to reduce the well spacing on the basis of the study of reasonable spacing in the early stage, and the infill well is also located in the middle position of the well and the lateral well to improve the production degree of the lateral area. The optimum well pattern infill scheme is selected by comparing the development index with numerical simulation. The optimal infill scheme is an infill form with a row distance of 110m, 296 infill wells, and a recovery degree of 18.48m.
【學位授予單位】：西南石油大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TE348

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本文編號：2346993