發(fā)布時(shí)間：2018-05-13 00:40

  本文選題：裂縫性碳酸鹽巖儲(chǔ)層 + 脈沖中子測(cè)井　； 參考：《吉林大學(xué)》2015年碩士論文

【摘要】：碳酸鹽巖儲(chǔ)層是一類重要的油氣儲(chǔ)集層。碳酸鹽巖儲(chǔ)集層中的油氣儲(chǔ)量占世界油氣總儲(chǔ)量的一半左右。碳酸鹽巖油氣田一般比碎屑巖油氣田更容易形成大型油氣田。我國(guó)碳酸鹽巖地層分布廣泛，像四川盆地、塔里木盆地的碳酸鹽巖地層中已經(jīng)發(fā)現(xiàn)了大中型油氣田。裂縫性碳酸鹽巖儲(chǔ)集層是一種致密的碳酸鹽巖儲(chǔ)層，這種儲(chǔ)層基質(zhì)孔隙小，，基本不具備滲透能力，發(fā)育的構(gòu)造裂縫充當(dāng)了油氣的儲(chǔ)集空間和滲濾通道，才形成良好的油氣儲(chǔ)層。 測(cè)井是儲(chǔ)層評(píng)價(jià)的重要手段。由于裂縫性碳酸鹽巖儲(chǔ)層縫洞發(fā)育，容易造成井眼垮塌，給裸眼常規(guī)測(cè)井帶來困難，常常缺少裸眼測(cè)井資料。脈沖中子測(cè)井作為一種套管井評(píng)價(jià)方法越來越多的應(yīng)用于裂縫性碳酸鹽巖儲(chǔ)層中。裂縫性碳酸鹽巖儲(chǔ)層多為縫洞型儲(chǔ)層，孔隙空間由基質(zhì)孔隙和次生孔隙構(gòu)成，具有裂縫和溶蝕孔洞發(fā)育，儲(chǔ)集空間分布縱橫、非均質(zhì)性強(qiáng)等特點(diǎn)；脈沖中子測(cè)井在該類儲(chǔ)層的應(yīng)用也受到限制，脈沖中子測(cè)井技術(shù)評(píng)價(jià)裂縫、提供儲(chǔ)層參數(shù)的能力有待進(jìn)一步研究。 蒙特卡羅方法是一種隨機(jī)數(shù)學(xué)的方法，在模擬粒子運(yùn)動(dòng)方面有獨(dú)特優(yōu)勢(shì)，被廣泛應(yīng)用于核測(cè)井中。為了解脈沖中子測(cè)井在裂縫性碳酸鹽巖儲(chǔ)層的應(yīng)用情況，研究其識(shí)別裂縫和定量評(píng)價(jià)儲(chǔ)層的能力，本文在整理了塔河地區(qū)裂縫性碳酸鹽巖儲(chǔ)層脈沖中子測(cè)井資料的基礎(chǔ)上試圖建立碳酸鹽巖儲(chǔ)層模型，用蒙特卡羅方法模擬裂縫對(duì)脈沖中子源熱中子密度分布的影響、脈沖中子測(cè)井識(shí)別裂縫的能力以及脈沖中子測(cè)井?dāng)?shù)據(jù)與裂縫孔隙度、飽和度等儲(chǔ)層參數(shù)的關(guān)系。本文研究結(jié)果為脈沖中子測(cè)井在碳酸鹽巖儲(chǔ)層上的應(yīng)用和定量解釋提供理論基礎(chǔ)。 研究結(jié)果表明，蒙特卡羅模擬的結(jié)果與實(shí)際測(cè)井資料和數(shù)值計(jì)算的規(guī)律較為一致。
[Abstract]:Carbonate reservoir is an important kind of oil and gas reservoir. Carbonate reservoirs account for about half of the world's total oil and gas reserves. Carbonate oil and gas fields are generally easier to form large oil and gas fields than clastic ones. Carbonate strata are widely distributed in China, such as Sichuan Basin and Tarim Basin. Large and medium oil and gas fields have been found in carbonate strata. The fractured carbonate reservoir is a tight carbonate reservoir with small pore matrix and no permeability. The developed structural fracture acts as the reservoir space and percolation channel to form a good oil and gas reservoir. Logging is an important means of reservoir evaluation. Due to the development of fracture and cavity in fractured carbonate reservoir, borehole collapse is easy to be caused, which brings difficulties to the conventional logging of open hole, and often lacks the data of open hole logging. As a casing well evaluation method, pulse neutron logging is more and more used in fractured carbonate reservoir. The fractured carbonate reservoirs are mostly fissured and cavernous reservoirs. The pore space is composed of matrix pores and secondary pores, with the characteristics of fracture and solution pore development, vertical and horizontal distribution of reservoir space, strong heterogeneity and so on. The application of pulsed neutron logging in this kind of reservoirs is also limited. The ability of pulse neutron logging to evaluate fractures and provide reservoir parameters needs further study. Monte Carlo method is a stochastic mathematical method with unique advantages in simulating particle motion and is widely used in nuclear logging. In order to understand the application of pulsed neutron logging in fractured carbonate reservoirs, the ability of identifying fractures and quantitatively evaluating reservoirs is studied. On the basis of sorting out the pulsed neutron logging data of fractured carbonate reservoir in Tahe area, this paper attempts to establish a carbonate reservoir model and use Monte Carlo method to simulate the influence of fractures on the thermal neutron density distribution of pulsed neutron source. The ability of pulse neutron logging to identify fractures and the relationship between pulse neutron logging data and reservoir parameters such as fracture porosity and saturation are discussed. The results of this paper provide a theoretical basis for the application and quantitative interpretation of pulsed neutron logging in carbonate reservoirs. The results show that the Monte Carlo simulation results are consistent with the actual logging data and numerical calculation.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：P618.13;P631.81

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