【摘要】：非常規(guī)油氣儲(chǔ)層一般都需要進(jìn)行壓裂改造才能獲得工業(yè)產(chǎn)能,而巖石脆性指數(shù)測(cè)井評(píng)價(jià)是非常規(guī)油氣儲(chǔ)層壓裂設(shè)計(jì)中應(yīng)考慮的重要因素之一。目前國(guó)內(nèi)外關(guān)于脆性指數(shù)定義眾多、且計(jì)算方法各異,在關(guān)于脆性指數(shù)的測(cè)井評(píng)價(jià)方法方面更是缺少一套完整的研究方法流程。本文回顧了油氣儲(chǔ)層脆性指數(shù)的研究歷程,明確了脆性指數(shù)定義的科學(xué)內(nèi)涵,歸納總結(jié)了脆性指數(shù)的測(cè)井評(píng)價(jià)方法。最后以鄂爾多斯盆地長(zhǎng)7致密油儲(chǔ)層為例,探討了主要的脆性指數(shù)測(cè)井評(píng)價(jià)方法計(jì)算流程及其有效性。在有縱、橫波測(cè)井資料時(shí),可利用泊-楊法直接計(jì)算巖石脆性指數(shù)。同時(shí)也可通過(guò)元素俘獲測(cè)井礦物成分比值法計(jì)算脆性指數(shù)。此外基于常規(guī)測(cè)井的最優(yōu)化方法確定礦物組分,利用礦物成分比值法也能計(jì)算脆性指數(shù)。通過(guò)X-射線衍射資料與巖性系數(shù)GR/Pe的回歸擬合建立地區(qū)經(jīng)驗(yàn)公式,也可實(shí)現(xiàn)巖石脆性指數(shù)的測(cè)井評(píng)價(jià)。最后對(duì)脆性指數(shù)測(cè)井計(jì)算中存在的問(wèn)題進(jìn)行歸納總結(jié),并對(duì)未來(lái)發(fā)展方向做出展望。研究成果可為非常規(guī)油氣儲(chǔ)層鉆井和壓裂設(shè)計(jì)工作提供科學(xué)指導(dǎo)。
[Abstract]:In order to obtain industrial productivity, unconventional oil and gas reservoirs usually need fracturing reconstruction, and the evaluation of rock brittleness index logging is one of the important factors that should be considered in fracturing design of unconventional oil and gas reservoirs. At present, there are many definitions of brittleness index at home and abroad, and the calculation methods are different, and there is a lack of a complete research method flow in well logging evaluation of brittleness index. This paper reviews the research history of the brittleness index of oil and gas reservoirs, defines the scientific connotation of the brittleness index, and summarizes the logging evaluation method of the brittleness index. Finally, taking Chang7 tight oil reservoir in Ordos Basin as an example, the calculation flow and validity of main brittleness index logging evaluation methods are discussed. When the longitudinal and shear wave logging data are available, the rock brittleness index can be calculated directly by the Poor-Yang method. The brittleness index can also be calculated by the method of mineral composition ratio of elemental capture logging. In addition, the mineral components can be determined based on the optimization method of conventional logging, and the brittleness index can also be calculated by using the mineral component ratio method. Through the regression fitting of X-ray diffraction data and lithology coefficient GR/Pe, the regional empirical formula can be established, and the log evaluation of rock brittleness index can also be realized. Finally, the problems existing in the calculation of brittleness index logging are summarized, and the future development direction is prospected. The research results can provide scientific guidance for drilling and fracturing design of unconventional oil and gas reservoirs.
【作者單位】： 中國(guó)石油大學(xué)(北京)地球科學(xué)學(xué)院;中國(guó)石油大學(xué)(北京)油氣資源與探測(cè)國(guó)家重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家科技重大專項(xiàng)(2011ZX05020-008、2016ZX05019-005-007) 國(guó)家自然科學(xué)基金(41472115)聯(lián)合資助
【分類號(hào)】：TE357;P631.81
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本文編號(hào)：2288560