本文選題：致密油氣藏 + 薄層　； 參考：《西南石油大學(xué)》2015年碩士論文

【摘要】：如今致密油氣藏是全球非常規(guī)油氣勘探的亮點領(lǐng)域同時也是難點之一。川東北大安寨儲層包括孔隙型和裂縫孔隙型儲層,其具有巖性復(fù)雜、孔隙結(jié)構(gòu)復(fù)雜、儲集空間類型多樣和儲層非均質(zhì)性強的特點,同時該區(qū)與國內(nèi)常見致密碳酸鹽巖儲層不同的是薄層和薄互層較發(fā)育。這些特點導(dǎo)致儲層的測井響應(yīng)規(guī)律性不強,使儲層參數(shù)計算和儲層有效性評價難度加大,因此需要做進一步的研究,建立一套適用于該區(qū)碳酸鹽巖油氣藏的儲層測井識別、評價技術(shù)與方法,以便更好地為油藏探勘開發(fā)服務(wù)。 本文通過數(shù)值模擬分析了薄層對測井響應(yīng)特征的影響,并對薄層測井響應(yīng)校正方法進行了探討和分析,確立了以反褶積法和頻率匹配法相結(jié)合的校正方法。 在地質(zhì)規(guī)律認(rèn)識的基礎(chǔ)上,通過對研究區(qū)巖性、物性、電性、含氣性的特征及其相互關(guān)系的研究表明,大安寨段儲層以介殼灰?guī)r和含泥介殼灰?guī)r為主,物性總體較差,裂縫的發(fā)育能有效改善其滲濾性。常規(guī)測井結(jié)合成像測井、ECS測井建立了巖性識別模式,運用多種方法識別裂縫和儲層,劃分出了孔隙型和裂縫-孔隙型兩類儲層。 采用了對巖性敏感的自然伽馬和電阻率曲線來計算灰?guī)r和砂巖的礦物含量,再利用混合骨架值計算基質(zhì)孔隙度。采用劃分流動單元的方法對取心井段展開了滲透率模型的評價,提高了滲透率模型的精度。用經(jīng)驗統(tǒng)計法、最小孔喉半徑法、孔隙結(jié)構(gòu)分類法、孔-滲關(guān)系法確定了儲層的物性下限值。利用多元線性回歸方法對裂縫有效性進行評價,并取得了較好的實際應(yīng)用效果。 本論文的完成為川東北大安寨致密碳酸鹽巖氣藏的巖性識別、儲層識別、儲層參數(shù)計算和儲層有效性評價提供了一套切實可行的方法,為進一步勘探開發(fā)提供了更加可靠的測井解釋依據(jù)。
[Abstract]:Nowadays, tight oil and gas reservoir is a bright spot in global unconventional oil and gas exploration and is also one of the difficulties. The Da'anzhai reservoir in northeast Sichuan consists of pore type and fractured pore type, which has the characteristics of complex lithology, complex pore structure, diverse reservoir space types and strong reservoir heterogeneity. At the same time, the thin layer and thin interbed are different from the common tight carbonate reservoirs in China. These characteristics lead to a lack of regularity of logging response, which makes it more difficult to calculate reservoir parameters and evaluate reservoir effectiveness. Therefore, further research is needed to establish a set of reservoir logging identification suitable for carbonate reservoirs in this area. Evaluation techniques and methods for better reservoir exploration and development services. In this paper, the influence of thin layer on logging response characteristics is analyzed by numerical simulation, and the correction method of thin layer logging response is discussed and analyzed, and a correction method combining deconvolution method with frequency matching method is established. On the basis of the understanding of geological laws, the characteristics of lithology, physical properties, electrical properties, gas-bearing properties and their interrelationships in the study area show that the reservoir in Da'anzhai section is dominated by meso-shell limestone and mud-bearing meso-shell limestone, and its physical properties are generally poor. The development of cracks can effectively improve its percolation. The lithology identification model is established by conventional logging combined with imaging logging ECS logging. The fracture and reservoir are identified by various methods and two types of reservoirs are divided into two types: pore type and fracture-pore type. Natural gamma and resistivity curves sensitive to lithology were used to calculate the mineral contents of limestone and sandstone, and the matrix porosity was calculated by using the mixed skeleton value. The permeability model of coring well is evaluated by dividing flow unit, and the precision of permeability model is improved. The lower limit values of reservoir properties are determined by empirical statistics method, minimal pore throat radius method, pore structure classification method and pore permeability relationship method. The multivariate linear regression method is used to evaluate the fracture effectiveness and good practical application results are obtained. The completion of this paper provides a set of feasible methods for lithologic identification, reservoir parameter calculation and reservoir effectiveness evaluation of tight carbonate reservoirs in Da'anzhai, Northeast Sichuan. It provides a more reliable basis for logging interpretation for further exploration and development.
【學(xué)位授予單位】：西南石油大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P618.13;P631.81

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