本文選題：蒸汽輔助重力泄油 + 蒸汽驅(qū)　； 參考：《東北石油大學(xué)》2015年碩士論文

【摘要】：超稠油常規(guī)吞吐采收率低,為探索超稠油開發(fā)方式轉(zhuǎn)換,進(jìn)一步提高油藏采收率,2006年9月在曙一區(qū)杜84塊開展了蒸汽吞吐輔助重力泄油(SAGD)先導(dǎo)試驗(yàn)。轉(zhuǎn)入SAGD開發(fā)以來,部分井組始終沒有達(dá)到方案設(shè)計(jì)指標(biāo),主要表現(xiàn)為產(chǎn)量低、油汽比低、儲(chǔ)量動(dòng)用狀況差、注采井間汽竄頻繁。通過油藏研究結(jié)合動(dòng)態(tài)分析,認(rèn)為以下兩方面因素影響了SAGD的開發(fā)效果:一是興Ⅵ組先導(dǎo)試驗(yàn)區(qū)內(nèi)局部夾層較為發(fā)育,蒸汽不易上覆,夾層上方儲(chǔ)量難動(dòng)用。二是轉(zhuǎn)SAGD前注汽井射孔井段區(qū)域采出狀況差,蒸汽不易擴(kuò)展,未形成蒸汽腔,泄油通道狹小,易發(fā)生汽竄。為改善SAGD井組生產(chǎn)效果,在廣泛調(diào)研、精細(xì)研究、深刻論證的基礎(chǔ)上,創(chuàng)新提出了重力泄油與蒸汽驅(qū)聯(lián)合開采方式,所謂聯(lián)合開采是指在同一區(qū)域、同一層位,在注汽直井與水平生產(chǎn)井之間以重力泄油為主,在注汽直井與生產(chǎn)直井之間以蒸汽驅(qū)為主的復(fù)合驅(qū)動(dòng),其目的是動(dòng)用夾層上方儲(chǔ)量;創(chuàng)新提出了由注汽直井連續(xù)注汽調(diào)整為間歇輪換注汽,其目的是抑制汽竄、促使蒸汽腔擴(kuò)展,形成穩(wěn)定的泄油井點(diǎn)。開展兩項(xiàng)試驗(yàn):一是在夾層發(fā)育的區(qū)域,注汽井夾層上下分別射孔、注汽,動(dòng)用夾層上方儲(chǔ)量,同時(shí)優(yōu)選邊部直井參與生產(chǎn),與注汽井形成蒸汽驅(qū)開采,動(dòng)用邊部?jī)?chǔ)量。二是針對(duì)蒸汽腔壓力高,易與水平井汽竄的注汽井,采取輪換注汽,培養(yǎng)蒸汽腔,抑制汽竄。此項(xiàng)技術(shù)在杜84塊興Ⅵ組先導(dǎo)試驗(yàn)區(qū)實(shí)施,有效動(dòng)用了興Ⅵ組先導(dǎo)試驗(yàn)區(qū)夾層上方的儲(chǔ)量,極大改善了興Ⅵ組先導(dǎo)試驗(yàn)區(qū)的生產(chǎn)效果,全面達(dá)到方案設(shè)計(jì)指標(biāo),取得了較好的經(jīng)濟(jì)效益。
[Abstract]:The conventional huff and puff recovery of super heavy oil is low. In order to explore the conversion of development mode of super heavy oil and further improve oil recovery, steam huff and puff assisted gravity discharge pilot test was carried out in du 84 block of Shu 1 district in September 2006. Since the development of SAGD, some well groups have failed to reach the project design targets, mainly as follows: low production, low oil / gas ratio, poor reserve production and frequent steam channeling between injection and production wells. Through reservoir research and dynamic analysis, it is concluded that the following two factors affect the development effect of SAGD: one is that the local intercalation is relatively developed, the steam is not easy to overlay, and the reserves above the interlayer are difficult to be used. The second one is that the region of perforation section of steam injection well before SAGD transfer is poor, the steam is not easy to expand, the steam cavity is not formed, the oil discharge channel is narrow, and the steam channeling is easy to occur. In order to improve the production effect of SAGD well group, on the basis of extensive investigation, fine research and deep demonstration, the combined production mode of gravity drain and steam drive is innovated. In order to produce reserves above intercalation, gravity oil discharge is the main factor between vertical steam injection wells and horizontal production wells, and steam drive is the main driving force between steam injection and production straight wells. It is proposed to adjust continuous steam injection from steam injection straight well to intermittent rotation steam injection, the purpose of which is to restrain steam channeling, to promote the expansion of steam cavity and to form a stable well discharge point. Two tests were carried out: first, in the area where the intercalation developed, the steam injection wells were perforated separately, steam injection was injected up and down, and the reserves above the interlayers were produced. At the same time, the best side selection of straight wells was involved in production, and steam drive production was formed with steam injection wells, and the reserves of the producing side were produced. Secondly, for steam injection wells with high pressure of steam chamber and easy to steam channeling with horizontal wells, rotation steam injection is adopted to cultivate steam cavities and restrain steam channeling. This technology was implemented in the pilot test area of Xing鈪，

本文編號(hào)：1951152