【正文】 I Master’s Thesis 論 文 題 目 典型水敏 油藏注水開發(fā)儲(chǔ)層傷害評(píng)價(jià)與保護(hù) 研究 摘 要 莫北油田 位于準(zhǔn)噶爾盆地 腹部包含莫北 莫 005 、莫 109 三個(gè)井區(qū)。其中莫北 莫 005 儲(chǔ)層 非均質(zhì)性 強(qiáng)， 屬于低孔、低滲 典型的強(qiáng)水敏 油藏 ， 于 2020 年投入開發(fā)。由于受油藏強(qiáng)水敏特征影響與注水傷害，這兩個(gè)井區(qū) 從投產(chǎn)至今 注水壓力 一直很 高 、注水困難 ， 導(dǎo)致 注水開發(fā)效果不理想。 莫 109 井區(qū) 域是新疆油田公司 2020 年重大滾動(dòng)勘探發(fā)現(xiàn)，預(yù)計(jì)可采儲(chǔ)量達(dá) 1000 萬噸，被確定為油田公司 2020 年重 點(diǎn)開發(fā)井區(qū)。由于該井區(qū)域內(nèi)油藏地質(zhì)特征均與已開發(fā)的 莫北 莫 005 井區(qū)屬于同一個(gè)油藏體系，地質(zhì)特征極其相近，為了做好該井區(qū)的 II 注水開發(fā)與油藏保護(hù)，避免重蹈莫北 莫 005 井區(qū)注水傷害的后果， 因此 針對(duì)這一典型的低滲強(qiáng)水敏油藏 盡早開展 了 儲(chǔ)層 傷害評(píng)價(jià)及 儲(chǔ)層保護(hù) 研究 ， 以 達(dá)到指導(dǎo)該井區(qū)的 科學(xué)合理的 開發(fā)、 減少儲(chǔ)層傷害，提高油藏 注水 開發(fā)效果 的目的 。 同時(shí)，通過本課題的研究與認(rèn)識(shí)，達(dá)到給同類油藏的注水開發(fā)以 參考、 借鑒 、指導(dǎo) 的 目的 。 本文在對(duì) 典型低滲強(qiáng)水敏油藏 莫 109 井區(qū)油藏地質(zhì)及儲(chǔ)層特征進(jìn)行研究的基礎(chǔ)上，開展了儲(chǔ)層 敏感性評(píng)價(jià)實(shí) 驗(yàn)、注水可行性實(shí)驗(yàn)、注入水與地層水配伍性 實(shí)驗(yàn) 、粘土穩(wěn)定劑篩選 實(shí)驗(yàn) 等 研究工作，并取得了以下主要結(jié)論與認(rèn)識(shí)： （ 1）油藏地質(zhì)特征及儲(chǔ)層特征分析 表明， 莫 109 井 區(qū) 三工河組油藏儲(chǔ)層粘土礦物含量較低，平均為 %、 平均 孔隙度 %，平均滲透率 （ J1s21） 103μm2，屬于 低孔、低滲矛盾非常突出的 油藏， 莫 109 井 區(qū) 剖面和平面滲透率差異較大，剖面和平面矛盾 突 出。 （ 2）儲(chǔ)層敏感性實(shí)驗(yàn)表明， 莫 109 井區(qū) 儲(chǔ)層 屬于 弱速敏、 弱酸敏 和 中等堿敏 、 中等 偏強(qiáng)水敏 的儲(chǔ)層， 平均水敏指數(shù) ， 通過分析 巖心粘土礦物含 量、巖心滲透率和巖心孔隙結(jié)構(gòu)與水敏指數(shù)關(guān)系，認(rèn)為儲(chǔ)層的 中等 偏強(qiáng)水敏 特性 與滲透率和孔隙結(jié)構(gòu)有關(guān) 。 （ 3） 經(jīng)注水傷害評(píng)價(jià)與 粘土穩(wěn)定劑篩選實(shí)驗(yàn)得出了 水敏儲(chǔ)層注水必須進(jìn)行持續(xù)地注水防膨保護(hù)的認(rèn)識(shí)： 合適的 粘土防膨劑 為 H2 粘土穩(wěn)定劑 、 濃度為 %。且通過注入方式實(shí)驗(yàn)研究，確定了合適的注入方式為連續(xù)注入。 （ 4）注水可行性實(shí)驗(yàn)及注入水與地層水配伍性實(shí)驗(yàn)表明， 莫 109 井 區(qū) 三工河組油藏在 注水 過程 中，注入水與地層水配伍性較好 ， 結(jié)合 驅(qū)油速度對(duì)油藏巖心的驅(qū)油效率 影響 實(shí)驗(yàn) ， 確定了最大 滲流速度為 。 本文的研究 成果豐富 了 低滲水敏 油藏注水開發(fā)過程中的儲(chǔ)層傷害與保護(hù) 措施 ，為提高該油藏注水開發(fā)效果提供了技術(shù)保障，同時(shí)也為類似 水敏 油藏注水開發(fā)過程中的儲(chǔ)層保護(hù)提供了有益的參考。 關(guān)鍵詞 ：莫 109 井區(qū)；注水開發(fā)；儲(chǔ)層傷害 ； 儲(chǔ)層保護(hù) ； III Abstract MOBEI oilfield lies in the center part of Junggar basin , which includes three bore fields MOBEI2,MO005 and MO109. The bore fields MOBEI2 and MO005 have exploited since 2020, which have a characteristics of heterogeneity , lowporosity ,low permeability and are highly sensitive to water. The water injection pressure is high and the effect of water flooding is not ideal as the results of strong sensitivity to water and reservoir damage. The bore field MO109 is a major found in the rolling exploration of XinJiang oilfield pany in2020, which has 10 million tons recoverable reserves and was identified as the key development field. Because the reservoir geological characteristics of this area is similar to MOBEI2 and MO109 and the same bad consequences of reservoir damage must be avoided, the reservoir damage evaluation and protection technology research must be carried out as soon as possible, so as to reduce reservoir damage and improve the effect of water flooding .At the same time, this paper can provide the reference and guidance to the reservoirs development ,which have the same geology and reservoir characteristics. On the basis of geology and reservoir characteristics research ,this paper has carried out the reservoir sensitivity evaluation experiment ,water injection feasibility experiment, injection water and formation water patibility experiment , clay stabilizer screening experiment. The main conclusions are made as follows: The geology characteristics and reservoir characteristics analysis shows that the average clay mineral content of sangonghe formation in bore field MO109 is %, which is low, the average porosity is % and average permeability is x 103 μ low porosity and low permeability reservoir has a outstanding contradiction between the profile and plane permeability. The reservoir sensitivity experiments show that the reservoir has a weak sensitivity to injection velocity and acid ,a medium sensitivity to alkali and water, whose water sensitivity index is . Analyzing the relationship between the core clay mineral content, core permeability, pore structure and water sensitivity index, the medium water sensitivity is caused by permeability and the pore structure. IV The appropriate H2 clay stabilizer is chosen by the clay stabilizer screening experiment. And the experiment implies the appropriate concentration is % and the confirms the right injection way is continuous. The water injection feasibility experiment and patibility experiment shows that the injection water and formation water have a good patibility in the injection process. The experiment about the rate on displacement efficiency confirms the biggest seepage at m/d. The results of this paper enrich the reservoir damage and protection technology in the water flooding process of Sanhegong formation in well field MO109 and provide the technical support. This paper also offers beneficial reference to the similar reservoirs in the water flooding process. Keyword: MO 109 Wellfield, Water flooding, reservoir damage。 reservoir protection V 目 錄 摘 要 ................................................................................................................................. I ABSTRACT ......................................................................................................................III 第 1章 緒論 ............................................................................................................................ 1 研究的目的和意義 ....................................................................................................... 1 國內(nèi)外儲(chǔ)層保護(hù)技術(shù)發(fā)展現(xiàn)狀 ................................................................................... 2 主要研究內(nèi)容和技術(shù)路線 ........................................................................................... 3 主要研究內(nèi)容 ....................................................................................................... 3 技術(shù)路線 ............................................................................................................... 4 主要研究成果 ............................................................................................................... 5 第 2章 油藏地質(zhì)特征及儲(chǔ)層特征分析 ................................................................................ 6 油藏地質(zhì)特征 ............................................................................................................... 6 儲(chǔ)層巖礦特征 .....