【摘要】：地下油氣滲流理論是開發(fā)的基礎(chǔ),試井分析技術(shù)可為儲層合理高效開發(fā)提供技術(shù)支持。許多的多層致密砂巖儲層、縫洞性碳酸鹽巖儲層、煤層氣儲層等復(fù)雜儲層多采用壓裂后開采,針對這些儲層壓裂井生產(chǎn)引發(fā)的一系列滲流問題,開展了不穩(wěn)定滲流理論模型與試井分析方法研究。按照不同儲層類型的特點,建立并求解了一系列壓裂井滲流模型,繪制了典型的試井分析樣版曲線,研究了滲流流動階段,并分析了各模型參數(shù)對試井樣版曲線的敏感性特征。研究的模型主要有：(1)4個多層儲層壓裂井不穩(wěn)定滲流模型(多層合壓無限導(dǎo)流垂直裂縫井模型；多層合壓有限導(dǎo)流垂直裂縫井模型；多層分層壓裂無限導(dǎo)流垂直裂縫井模型和多層分層壓裂有限導(dǎo)流垂直裂縫井模型),著重分析了裂縫導(dǎo)流能力、裂縫表皮、層間儲容系數(shù)、層間流動系數(shù)等參數(shù)對樣版曲線的敏感性特征；(2)3類多重介質(zhì)儲層的5個壓裂井不穩(wěn)定滲流模型(裂縫型儲層擬穩(wěn)態(tài)竄流模型；裂縫型儲層非穩(wěn)態(tài)竄流模型；孔洞型儲層模型；裂縫孔洞型儲層擬穩(wěn)態(tài)竄流模型；裂縫孔洞型儲層非穩(wěn)態(tài)竄流模型),著重分析了竄流系數(shù)、儲容系數(shù)等參數(shù)對樣版曲線的敏感性特征；(3)4類非均質(zhì)復(fù)合儲層的9個壓裂井不穩(wěn)定滲流模型(多層合壓復(fù)合模型、多層分層壓裂復(fù)合模型、分別考慮擬穩(wěn)態(tài)竄流和非穩(wěn)態(tài)竄流的裂縫型復(fù)合儲層模型、孔洞型復(fù)合儲層模型和分別考慮擬穩(wěn)態(tài)竄流和非穩(wěn)態(tài)竄流的裂縫孔洞型復(fù)合儲層模型),著重研究了復(fù)合半徑、各區(qū)流度比、各區(qū)導(dǎo)壓系數(shù)比等參數(shù)對樣版曲線的敏感性特征；(4)2個煤層氣壓裂井不穩(wěn)定滲流模型(基質(zhì)煤層氣擬穩(wěn)態(tài)擴(kuò)散模型和非穩(wěn)態(tài)擴(kuò)散模型),著重研究了天然割理儲容系數(shù)、基質(zhì)向天然割理竄流系數(shù)和吸附系數(shù)等參數(shù)對樣版曲線的敏感性特征。最后,通過不同儲層類型的現(xiàn)場實例擬合解釋,獲得了有用的儲層參數(shù)。研究成果可開發(fā)成專業(yè)的試井分析軟件推廣到現(xiàn)場應(yīng)用,為油氣田開發(fā)生產(chǎn)服務(wù)。研究成果還可為國內(nèi)外同類型的復(fù)雜儲層壓裂井滲流理論與應(yīng)用研究提供參考和指導(dǎo)。
[Abstract]:The theory of underground oil and gas percolation is the basis of development. Well test analysis technology can provide technical support for rational and efficient development of reservoir. Many complex reservoirs, such as multi-layer tight sandstone reservoirs, fracture-cavernous carbonate rock reservoirs and coalbed methane reservoirs, are exploited after fracturing. In view of a series of percolation problems caused by the production of fracturing wells in these reservoirs, The theoretical model and well test analysis method of unstable seepage flow are studied. According to the characteristics of different reservoir types, a series of fracturing well percolation models are established and solved, typical well test analysis pattern curves are drawn, the seepage flow stage is studied, and the sensitivity characteristics of model parameters to well test pattern curves are analyzed. The main research models are as follows: (1) four unsteady percolation models of multi-layer reservoir fracturing wells (multi-layer pressure infinite diversion vertical fracture well model, multi-layer pressure finite flow diversion vertical fracture well model; This paper analyzes the fracture conductivity, the fracture skin, the interlayer storage coefficient, and the multi-layer fracturing model with infinite diversion vertical fracture well model and multi-layer stratified fracturing finite flow diversion vertical fracture well model with emphasis on the analysis of fracture conductivity, fracture epidermis and interlayer storage capacity coefficient. The sensitivity of parameters such as interlayer flow coefficient to the sample curve; (2) five unstable percolation models of fracturing wells (pseudo-steady flow model for fractured reservoir; unsteady channeling model for fractured reservoir; porosity reservoir model; In this paper, the quasi-steady flow model of fractured porosity reservoir and the unsteady flow model of fractured pore type reservoir are discussed. The sensitivity of the parameters such as channeling coefficient, storage and volume coefficient to the sample curve is analyzed. (3) 9 fracturing well unstable percolation models (multilayer pressure composite model, multilayer stratified fracturing composite model) of 4 kinds of heterogeneous composite reservoirs, which consider the fractured composite reservoir model of pseudo-steady state channeling flow and unsteady state channeling flow, respectively. In this paper, the sensitivity characteristics of the parameters of composite radius, mobility ratio and pressure conductivity ratio to the curve of sample plate are studied in detail, including the model of porous composite reservoir and the model of fracture pore type complex reservoir considering pseudo-steady flow and unsteady channeling, respectively, and the characteristics of sensitivity of the parameters such as composite radius, mobility ratio of each region and ratio of pressure conductivity coefficient of each district to the sample plate curve. (4) two unsteady percolation models of coalbed gas fracturing wells (matrix coalbed methane quasi-steady diffusion model and unsteady diffusion model). The sensitivity of matrix to natural cleavage flow coefficient and adsorption coefficient to the curve of sample plate. Finally, some useful reservoir parameters are obtained by field simulation and interpretation of different reservoir types. The research results can be developed into a professional well test analysis software to be applied in the field and serve the development and production of oil and gas fields. The research results can also provide reference and guidance for the study of percolation theory and application of the same type of complex reservoir fracturing wells at home and abroad.
【學(xué)位授予單位】：西南石油大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2015
【分類號】：TE312
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本文編號：2256916