本文選題：測井屬性分析 + 致密油儲層　； 參考：《中國石油大學(xué)(華東)》2015年碩士論文

【摘要】：致密儲層往往巖石顆粒較小、壓實作用較強、泥質(zhì)含量較高導(dǎo)致其儲集空間小,滲流能力差,一般無自然產(chǎn)能或自然產(chǎn)能極低,往往打水平井,然后進行壓裂。對于該類儲層,裂縫不僅是油氣儲層的空間,而且還是油氣滲流的重要通道,對儲層的產(chǎn)能影響作用十分大。因此,如何有效的定量評價裂縫及進行產(chǎn)能預(yù)測,對勘探和開發(fā)有著重要意義。本文針對致密儲層裂縫的特殊情況,分析了常規(guī)曲線、電成像及錄井資料的裂縫響應(yīng)特征,基于測井屬性分析,提取相應(yīng)的裂縫屬性參數(shù),構(gòu)建裂縫發(fā)育程度綜合指標(biāo),把裂縫發(fā)育程度分為三類:發(fā)育、欠發(fā)育和不發(fā)育。系統(tǒng)分析了裂縫發(fā)育程度、有機碳TOC含量、巖石脆性指數(shù)和產(chǎn)能的關(guān)系,并對儲層產(chǎn)能進行分類,把儲層分為一類產(chǎn)層、二類產(chǎn)能和干層。同時考慮壓裂縫對產(chǎn)能的影響,推導(dǎo)適合無限大地層和有邊界地層的水平井產(chǎn)能解析解,以及推導(dǎo)出水平井眼任一點的表皮系數(shù)。并利用試油法、含油產(chǎn)狀法、壓汞法和核磁法綜合劃分儲層下限;以及利用流動單元法和大孔喉法計算地面滲透率,并基于實驗分析求取覆壓滲透率,有效的提高了滲透率的計算精度;針對儲層的孔隙度大小,從電法和非電法的角度計算含油飽和度;基于KGD和PKN裂縫模型計算裂縫參數(shù)。最后基于層厚、孔隙度、含油飽和度和巖石脆性指數(shù)構(gòu)建產(chǎn)能指數(shù),定量評價儲層產(chǎn)能;以及利用解析公式分別求取了無限大地層和有邊界地層的水平井產(chǎn)能,該結(jié)果表明,考慮裂縫的解析公式較產(chǎn)能指數(shù)法更接近于地層真實情況,求取的產(chǎn)能更準(zhǔn)確,說明了解析公式求產(chǎn)能的可行性。
[Abstract]:The tight reservoir often has small rock particles, strong compaction and high muddy content, which results in small reservoir space and poor percolation capacity, generally without natural productivity or extremely low natural productivity, so horizontal wells are often drilled and fracturing is carried out. For this kind of reservoir, fracture is not only the space of oil and gas reservoir, but also the important passage of oil and gas percolation, which has great influence on reservoir productivity. Therefore, it is important for exploration and development to evaluate fractures and predict productivity effectively. In this paper, according to the special situation of tight reservoir fracture, the fracture response characteristics of conventional curve, electrical imaging and logging data are analyzed. Based on log attribute analysis, the corresponding fracture attribute parameters are extracted, and the comprehensive index of fracture development degree is constructed. The degree of fracture development is divided into three types: development, underdevelopment and non-development. The relationship between fracture development degree, TOC content of organic carbon, rock brittleness index and productivity is analyzed systematically. The reservoir productivity is classified into three categories: production layer, productivity and dry layer. At the same time, considering the influence of fracture pressure on productivity, the analytical solution of horizontal well productivity suitable for infinite formation and boundary formation is derived, as well as the skin coefficient of horizontal hole at any point. The lower limit of reservoir is divided by oil test method, oil-bearing occurrence method, mercury injection method and nuclear magnetic method, and the surface permeability is calculated by flow unit method and macropore throat method, and the overburden permeability is obtained based on experimental analysis. The calculation accuracy of permeability is improved effectively, the oil saturation is calculated from the angle of electric method and non-electric method, and the fracture parameters are calculated based on KGD and PKN fracture model. Finally, based on formation thickness, porosity, oil saturation and rock brittleness index, productivity index is constructed to quantitatively evaluate reservoir productivity, and horizontal well productivity of infinite formation and boundary formation is obtained by analytic formula. The analytical formula considering fracture is more close to the real condition of formation than productivity index method, and the calculated productivity is more accurate, which shows the feasibility of calculating productivity by analytic formula.
【學(xué)位授予單位】：中國石油大學(xué)(華東)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TE328

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