【摘要】：針對(duì)低滲透和特低滲透油藏的開(kāi)發(fā)研究,一直是國(guó)內(nèi)外油氣田開(kāi)發(fā)的重點(diǎn)和難點(diǎn)。其中低滲透油藏的非均質(zhì)性對(duì)產(chǎn)能的影響,更是重中之重。不僅對(duì)發(fā)展低滲透油藏非均質(zhì)特征滲流數(shù)學(xué)模型理論,研究低滲透油藏產(chǎn)能與啟動(dòng)壓力梯度間的機(jī)理和規(guī)律,同時(shí)對(duì)推動(dòng)油藏滲流理論研究的進(jìn)展也具有十分重要的意義。本文首先基于非均質(zhì)油藏滲透率構(gòu)型的3種典型分布模式,考慮低滲透油藏啟動(dòng)壓力梯度函數(shù)的影響,將滲透率構(gòu)型引入到啟動(dòng)壓力梯度函數(shù)表征方程,推導(dǎo)單相流動(dòng)時(shí)的產(chǎn)能計(jì)算公式,建立利用生產(chǎn)動(dòng)態(tài)資料反演滲透率構(gòu)型參數(shù)的優(yōu)化算法,并通過(guò)數(shù)值模擬,進(jìn)行驗(yàn)證計(jì)算。然后,結(jié)合兩相滲流的相滲曲線關(guān)系和啟動(dòng)壓力梯度方程,推導(dǎo)出兩相滲流時(shí)產(chǎn)能計(jì)算公式及優(yōu)化反演構(gòu)型參數(shù)方法,并通過(guò)數(shù)值算例驗(yàn)證。最后,在不同井網(wǎng)類型的條件下針對(duì)流動(dòng)分區(qū)進(jìn)行演算,從而形成全油藏下的數(shù)值理論計(jì)算方法�？傊�,本文是根據(jù)低滲透非均質(zhì)油藏參數(shù)區(qū)域分布的滲流特點(diǎn),結(jié)合單井——井網(wǎng)——全油藏的多尺度劃分方法,重點(diǎn)研究低滲透油藏非均質(zhì)構(gòu)型的滲流數(shù)學(xué)特征,并且基于非均質(zhì)滲透率構(gòu)型,對(duì)以往的產(chǎn)能公式進(jìn)行修正,建立一套基于非達(dá)西滲流特征的適合低滲透油藏的滲流數(shù)學(xué)模型計(jì)算方法及優(yōu)化反演理論。
[Abstract]:The development of low permeability and ultra low permeability reservoirs has always been the focus and difficulty of oil and gas field development at home and abroad. The influence of heterogeneity of low permeability reservoir on productivity is the most important. It is of great significance not only to develop the mathematical model theory of heterogeneous characteristic percolation in low permeability reservoirs, but also to study the mechanism and law between productivity and start-up pressure gradient of low permeability reservoirs, as well as to promote the development of percolation theory in low permeability reservoirs. In this paper, based on three typical distribution models of permeability configuration in heterogeneous reservoir, the influence of starting pressure gradient function on low permeability reservoir is considered, and the permeability configuration is introduced into the characterization equation of starting pressure gradient function. The productivity calculation formula for single-phase flow is derived, and the optimization algorithm for inversion of permeability configuration parameters by using production dynamic data is established, and the numerical simulation is carried out to verify the calculation. Then, based on the relationship between the two-phase seepage curve and the starting pressure gradient equation, the productivity calculation formula and the optimization inversion configuration parameter method are derived, and verified by numerical examples. Finally, under the conditions of different well patterns, the flow zone is calculated to form a numerical calculation method for the whole reservoir. In a word, according to the seepage characteristics of the regional distribution of the parameters of low permeability heterogeneous reservoirs, combined with the multi-scale division method of single well-well pattern-whole reservoir, this paper focuses on the mathematical characteristics of the heterogeneity configuration of low permeability reservoirs. Based on the heterogeneous permeability configuration, the previous productivity formula is modified, and a set of mathematical model calculation methods and optimal inversion theory for low permeability reservoirs based on the characteristics of non-Darcy seepage flow are established.
【學(xué)位授予單位】：東北石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TE312
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本文編號(hào)：2446186