本文關(guān)鍵詞：石樓西區(qū)塊致密砂巖氣藏精細描述及開發(fā)對策　出處：《東北石油大學》2015年碩士論文　論文類型：學位論文

  更多相關(guān)文章： 致密砂巖氣藏 地層對比 沉積相 氣藏精細描述 三維地質(zhì)建模

【摘要】：石樓西區(qū)塊屬于低壓、低豐度的致密砂巖氣藏,鉆井揭示的主要含氣層位有石盒子組盒8段和山西組,產(chǎn)氣層位多,而沉積環(huán)境又不盡相同,導致地質(zhì)情況較為復雜。各層位巖性不同,孔隙類型及結(jié)構(gòu)特征也不同,儲層非均質(zhì)性強,砂體及有效氣層連續(xù)性和連通性較差。本文以完鉆井資料為基礎,綜合應用鉆井、錄井、測井資料,識別地層對比標志層,在標志層控制下,采用“旋回對比、分級控制、逐井追索、剖面閉合”的方法,完成48口直井的地層對比工作,在此基礎上進行構(gòu)造特征研究。結(jié)合區(qū)域的沉積背景,多次到現(xiàn)場觀察巖心及野外露頭,應用測井及巖心分析化驗資料識別不同沉積環(huán)境的測井相類型,展開單井相及連井剖面相研究,進而繪制各主力小層的平面沉積相展布圖。從巖性、孔隙類型及結(jié)構(gòu)、物性、成巖作用及非均質(zhì)性等特征的研究入手,全面掌握儲層特征,最后建立了儲層三維地質(zhì)模型,可以以任何形式展示和調(diào)用各種屬性模型,真正實現(xiàn)了氣藏靜態(tài)參數(shù)的數(shù)字化、地質(zhì)體和地質(zhì)屬性模型化。通過對區(qū)塊的氣藏精細描述,取得以下認識:區(qū)塊地層分布穩(wěn)定,對比標志層較多,地層對比與劃分準確;區(qū)塊構(gòu)造較為簡單,局部微構(gòu)造發(fā)育;區(qū)塊沉積環(huán)境變化頻繁,山2段主要發(fā)育近海潮汐三角洲平原沉積,山1段主要發(fā)育近海潮控三角洲前緣沉積,盒8段為辮狀河三角洲前緣亞相沉積;山2段以石英砂巖、巖屑石英砂巖為主,溶孔—粒間孔型,山1段以巖屑砂巖為主,晶間孔—巖屑溶孔型,盒8段以巖屑砂巖為主,巖屑溶孔—晶間孔型,各層位非均質(zhì)性均較強;區(qū)塊主要儲層具有超低孔——特低孔、超低滲特征,各小層物性山23段相對較好,其次是山13、盒86、山21;綜合評價,主要儲層以山2段相對最好,其次為山1、盒8。山2段相對含氣富集區(qū)域有YH30—YH33井區(qū)、YH15—YH18井區(qū)、YH38井區(qū),山1段相對含氣富集區(qū)域有YH19—YH20井區(qū),盒8段相對含氣富集區(qū)域有YH9—YH7井區(qū)、YH15—YH17井區(qū)。在氣藏描述的基礎上,提出了開發(fā)對策,并優(yōu)選一個水平井先導試驗區(qū)。
[Abstract]:The stone floor of west block belongs to the low pressure, low abundance of tight sandstone gas reservoirs, drilling revealed the main gas bearing strata have Shihezi 8 section and the Shanxi gas group, the multiple layers, and the sedimentary environment is not the same, leading to the geological situation is more complicated. Each layer of different lithology, pore types and structure characteristics are different. Strong reservoir heterogeneity, reservoir sand body and effective continuity and connectivity is poor. Based on the finished drilling data, comprehensive application of drilling, logging, logging data, formation identification of symbol layer in the layer under the control of the "cycle comparison and hierarchical control, well tracing method section closed" complete, 48 vertical wells in the stratigraphic correlation, the study on structural characteristics on the basis of combining the regional sedimentary background, has been to the scene to observe cores and outcrops, the sedimentary environment of different applications of logging and core analysis data recognition Logging facies, single well facies expansion and the well section of the plane sedimentary facies, and then draw the main small layer map. From the lithology, pore types and structure properties, the study of diagenesis and heterogeneity characteristics of a comprehensive grasp of the reservoir characteristics, the three-dimensional geological model of reservoir set up, can be displayed in any form and various properties of call model, realize the digital reservoir static parameters, geological body and geological attribute model. Based on the block reservoir fine description, obtain the following understanding: the formation distribution of symbol layer stability, more accurate stratigraphic division and correlation of block structure is relatively simple; the local micro structure development; block, frequent changes of the sedimentary environment, mainly developed 2 mountain offshore tidal delta plain, mountain mainly developed 1 offshore tidal delta front facies, box 8 section of braided river delta front 緙樹簹鐩告矇縐，

本文編號：1418718