孔洞缝白云岩储层连通性评价方法研究及应用

发布时间：2018-05-25 17:41

本文选题：白云岩储层 + 连通性　；参考：《天然气地球科学》2017年08期

【摘要】：四川盆地磨溪区块龙王庙组储层为一套发育孔、洞、缝3种储集空间的白云岩储层。孔、洞、缝配置的多样性,造成不同滩体部位的储层物性及产能差异大,储层非均质性强,连通性评价难度大。针对这类储层的特点建立了动态、静态相结合的气井连通性评价方法,首先用静态分析法(地质特征、原始地层压力和流体性质对比分析方法)初步评价气藏(井)的连通性,再用动态分析法(试井、类干扰试井和生产动态分析法)进一步评价气藏(井)的连通性。最后,基于连通气井达到拟稳态渗流后,气井的配产与井控动储量成正比的渗流理论,结合动静态分析法的结果综合评价气藏(井)的连通性。通过该方法评价磨溪9井组的连通性,认识到该井组处于滩体的主体部位,气藏性质相同,新投产的井地层压力均下降,试井曲线无明显边界特征,生产动态曲线出现井间干扰现象及气井的配产与井控动储量成正比,证明气藏(井)的连通性好。由于磨溪009-X6井投产时的地层压力高于同一时间相距1.5km的磨溪009-X1井的地层压力,进一步说明该气藏(井)连通具有方向性。
[Abstract]:The Longwangmiao formation reservoir in Moxi block, Sichuan Basin, is a set of dolomite reservoirs with three kinds of reservoir space: pore, hole and fracture. The diversity of pore, hole and fracture configuration results in great difference of reservoir physical property and productivity, strong heterogeneity of reservoir and difficulty in evaluation of connectivity. According to the characteristics of this kind of reservoir, a dynamic and static combination of gas well connectivity evaluation method is established. Firstly, the connectivity of gas reservoir (well) is preliminarily evaluated by static analysis method (geological characteristics, correlation analysis method of original formation pressure and fluid properties). The connectivity of gas reservoirs is further evaluated by means of dynamic analysis (well testing, interference testing and production performance analysis). Finally, based on the percolation theory that the distribution of gas wells is proportional to the well controlled reserves after the connected gas wells reach the quasi-steady flow, the connectivity of the gas reservoirs is evaluated synthetically by combining the results of the dynamic and static analysis. Through this method, the connectivity of Moxi 9 well group is evaluated. It is recognized that the well group is in the main part of the beach body, the gas reservoir property is the same, the formation pressure of the newly put into production well is reduced, and the well test curve has no obvious boundary characteristics. The phenomenon of interwell interference in production performance curve and the proportion of gas well production are directly proportional to well controlled reserves, which proves that the connectivity of gas reservoir (well) is good. Because the formation pressure of Moxi 009-X6 well is higher than that of Moxi 009-X1 well with the same time interval 1.5km, it is further proved that the gas reservoir (well) is connected in a directional way.
【作者单位】：中国石油勘探开发研究院;
【基金】：中国石油股份公司深层油气重大专项“深层油气藏开发关键技术”(编号:2014E-3203)资助
【分类号】：TE31

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