本文選題：杏71井區(qū) + 扶楊油層　； 參考：《東北石油大學(xué)》2015年碩士論文

【摘要】：杏71井區(qū)位于松遼盆地北部中央坳陷區(qū)大慶長(zhǎng)垣杏樹(shù)崗油田的杏北開(kāi)發(fā)區(qū),扶楊油層在中生界白堊系泉頭組三、四段地層內(nèi)。本文在綜合前人研究成果和研究區(qū)水力壓裂資料、測(cè)井和地質(zhì)資料的基礎(chǔ)上,綜合運(yùn)用數(shù)學(xué)、力學(xué)、地質(zhì)學(xué)等多種方法原理建立了地應(yīng)力與構(gòu)造裂縫參數(shù)之間的定量關(guān)系,系統(tǒng)開(kāi)展了地應(yīng)力大小和方向研究、地應(yīng)力場(chǎng)數(shù)值模擬、地應(yīng)力分布影響因素分析、裂縫發(fā)育特征預(yù)測(cè)等方面的研究。通過(guò)水力壓裂資料、測(cè)井資料以及有限元法數(shù)值模擬研究,認(rèn)為杏71井區(qū)FⅠ組最大水平地應(yīng)力在32.20MPa~38.73MPa之間,最小水平主應(yīng)力在22.76MPa~30.28MPa之間;FⅡ組最大水平地應(yīng)力在30.15MPa~36.52MPa之間,最小水平主應(yīng)力在25.34MPa~29.67MPa之間。杏71井區(qū)最大水平主應(yīng)力方位大致為東西向,FⅠ1~FⅡ5層最大水平地應(yīng)力方位為近東西向,其中FⅠ組在NE45°~NE110°之間;FⅡ組在NE55°~NE102.4°之間。通過(guò)改變杏71井區(qū)區(qū)域地層物性參數(shù)再模擬驗(yàn)證地應(yīng)力分布變化的方法,主要考慮了巖性變化和斷層性質(zhì)等對(duì)區(qū)域應(yīng)力場(chǎng)的影響。通過(guò)對(duì)杏71井區(qū)及周邊取心井巖心裂縫描述發(fā)現(xiàn),杏71井區(qū)監(jiān)測(cè)井壓裂裂縫產(chǎn)狀均為垂直縫,裂縫方向?yàn)榻鼥|西方向,大致在北東80.9?~北東102.4?之間,左縫長(zhǎng)在29.1~44.4m之間,右縫長(zhǎng)在30~58.6m之間。研究區(qū)斷穿T2構(gòu)造層的斷裂主要為北北西走向,最大斷距114m,大部分小于100m,斷層平均走向?yàn)?48°;裂縫發(fā)育的總體規(guī)律為上盤(pán)密度大于下盤(pán),同時(shí)在斷裂走向發(fā)生改變的位置、斷裂交叉位置以及斷裂的端部裂縫密度較大。地應(yīng)力大小、方向決定著施工壓力以及裂縫的啟裂方位角、延伸方向和延伸軌跡等。因此搞清研究區(qū)的地應(yīng)力分布狀況以及裂縫發(fā)育特征,對(duì)提交經(jīng)濟(jì)可動(dòng)用探明儲(chǔ)量具有指導(dǎo)意義,也為下一步開(kāi)發(fā)方案適合的注采井網(wǎng),提高儲(chǔ)量動(dòng)用經(jīng)濟(jì)效益提供保障。
[Abstract]:Xing71 well area is located in Xingbei Development Zone in Daqing Changyuan Xingshugang Oilfield in the central depression of northern Songliao Basin. Fuyang oil layer is in the third and fourth member of Quantou formation of Mesozoic Cretaceous system. On the basis of synthesizing the previous research results, hydraulic fracturing data, logging and geological data in the study area, the quantitative relationship between geostress and structural fracture parameters is established by means of mathematics, mechanics, geology and other methods. Research on the magnitude and direction of in-situ stress, numerical simulation of in-situ stress field, analysis of influencing factors of in-situ stress distribution and prediction of fracture development characteristics were carried out systematically. Based on hydraulic fracturing data, logging data and finite element numerical simulation, it is considered that the maximum horizontal ground stress of group F 鈪，

本文編號(hào)：2059886