發(fā)布時間：2018-05-05 11:45

  本文選題：頁巖氣儲層 + 雙側(cè)向測井��； 參考：《中國地質(zhì)大學(北京)》2015年碩士論文

【摘要】：頁巖氣是一種非常重要的非常規(guī)能源,對于緩解我國的能源壓力,保障我國的能源安全方面有著重要的作用。我國頁巖氣儲量較為豐富,主要分布在南方地區(qū)的海相頁巖中,由于南方地表條件以及地質(zhì)情況較為復雜,所以常規(guī)的地震勘探方法效果并不理想。儲層評價的重要參數(shù)之一就是電阻率,電法測井是一種能夠探測地層電阻率差異的地球物理方法,在油氣資源勘探中發(fā)揮著重要的作用。雙側(cè)向測井是一種具有淺側(cè)向和深側(cè)向兩種工作模式的電法測井方法,該方法在井中測量兩種模式下的視電阻率分布情況,利用正演模擬和反演技術(shù)來研究頁巖氣儲層油氣水層的分布特征。本文首先簡要介紹了雙側(cè)向測井的基本原理及其發(fā)展研究現(xiàn)狀,推導出了基于穩(wěn)定電流場的雙側(cè)向測井變分問題,然后用C/C++語言實現(xiàn)了雙側(cè)向測井有限元正演數(shù)值模擬程序,在求解有限元形成的線性方程組的過程中,采用了預處理共軛梯度算法以及壓縮矩陣存儲法,節(jié)省了計算機的存儲空間,并且根據(jù)解預處理共軛梯度算法的特點,利用GPU顯卡多線程編程技術(shù),在CUDA平臺上實現(xiàn)了GPU并行優(yōu)化,極大地提高了程序運行速度,最后研究了不同地層模型對雙側(cè)向正演模擬響應的影響。在總結(jié)前人資料的基礎上,建立了不同的頁巖氣儲層模型,分別分析了井徑,侵入帶,泥漿,地層厚度等不同地層參數(shù)對雙側(cè)向正演響應的影響,結(jié)果表明雙側(cè)向測井對于地層厚度大于1m的地層分辨較好,當井徑大于0.4m時,淺側(cè)向模擬結(jié)果無法反應地層的特征,當侵入深度大于1m時,雙側(cè)向測井無法反映出地層的特性。最后,根據(jù)四川地區(qū)頁巖儲層物性特征,建立了多層的碳質(zhì)頁巖儲層模型,研究表明:雙側(cè)向測井能夠較好區(qū)分低阻碳質(zhì)頁巖薄層,并且也能識別多套頁巖氣儲層。
[Abstract]:Shale gas is a very important unconventional energy, which plays an important role in relieving the energy pressure and ensuring the energy security in China. There are abundant shale gas reserves in China, mainly distributed in marine shale in southern China. Due to the complexity of surface conditions and geological conditions in southern China, the conventional seismic exploration methods are not satisfactory. Resistivity is one of the important parameters of reservoir evaluation. Electrical logging is a geophysical method which can detect the difference of formation resistivity and plays an important role in oil and gas exploration. Dual lateral logging is a kind of electric logging method with two working modes of shallow lateral and deep lateral. This method measures the distribution of apparent resistivity in wells under two modes. Forward modeling and inversion techniques are used to study the distribution characteristics of oil, gas and water layers in shale gas reservoirs. In this paper, the basic principle and development status of dual lateral logging are briefly introduced, the variational problem of dual lateral logging based on steady current field is deduced, and the forward numerical simulation program of double lateral logging is realized by using C / C language. In the process of solving the linear equations formed by the finite element method, the preprocessing conjugate gradient algorithm and the compression matrix storage method are used to save the storage space of the computer, and according to the characteristics of the solution preprocessing conjugate gradient algorithm, Using the multithread programming technology of GPU graphics card, the parallel optimization of GPU is realized on the CUDA platform, which greatly improves the running speed of the program. Finally, the influence of different stratigraphic models on the response of the double-lateral forward simulation is studied. On the basis of summarizing the previous data, different shale gas reservoir models are established, and the effects of different formation parameters, such as well diameter, intrusive zone, mud and formation thickness, on the dual lateral forward response are analyzed respectively. The results show that dual lateral logging is better for the formation with formation thickness greater than 1m. When the diameter is greater than 0.4 m, the shallow lateral simulation results can not reflect the formation characteristics, and when the invasion depth is more than 1m, the dual lateral logging can not reflect the formation characteristics. Finally, according to the physical characteristics of shale reservoir in Sichuan area, a multi-layer carbon shale reservoir model is established. The results show that dual lateral logging can distinguish the low resistivity carbonaceous shale thin layer and identify multiple sets of shale gas reservoirs.
【學位授予單位】：中國地質(zhì)大學(北京)
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：P618.13;P631.81

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