本文關(guān)鍵詞：延安氣田延氣2-延128井區(qū)上古生界致密砂巖氣測井解釋研究　出處：《西安石油大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 致密砂巖儲層 測井解釋 上古生界 延安氣田

【摘要】：本論文以延安氣田延氣2-延128井區(qū)上古生界儲層為例,在結(jié)合前人的研究成果的基礎(chǔ)上,通過對沉積作用以及成巖作用的分析,利用測井資料、基礎(chǔ)地質(zhì)資料、巖心分析化驗資料以及油田實際生產(chǎn)動態(tài)等資料,從延安氣田延氣2-延128井區(qū)上古生界儲層的地質(zhì)特征出發(fā),針對研究區(qū)致密砂巖儲層的巖性識別、復(fù)雜的孔隙結(jié)構(gòu)及其測井響應(yīng)特征復(fù)雜等困難問題進(jìn)行了研究,取得的成果和認(rèn)識如下:研究區(qū)主要發(fā)育兩種類型的沉積體系即三角洲沉積體系(盒8段、山1段和山2段)和障壁海岸沉積體系(本溪組)。儲層巖性主要有細(xì)砂巖、中砂巖、粗砂巖、含礫粗砂巖、細(xì)礫巖、中礫巖和砂質(zhì)礫巖等,其孔隙度主體介于4.0%~12.0%,滲透率在0.01m D~3.0m D之間,屬特低孔、特低滲致密型儲集層。成巖作用類型多樣:主要有機(jī)械壓實作用、壓溶作用、膠結(jié)作用和溶蝕作用等,成巖演化復(fù)雜。通過采用聲波時差建立各小層孔隙度圖版,得到實測孔隙度與聲波時差回歸分析公式,并利用歸位后的巖心分析孔隙度對孔隙度解釋模型進(jìn)行檢驗,認(rèn)為測井處理孔隙度與歸位后的巖心分析孔隙度的平均相對誤差均不超過7%;采用密閉取心和測井解釋兩種方法進(jìn)行含氣飽和度確定,建立各層位含氣飽和度分析解釋模型。確定研究區(qū)有效厚度物性下限和電性下限標(biāo)準(zhǔn),并對下限標(biāo)準(zhǔn)進(jìn)行驗證,達(dá)到下限要求的層位均有氣產(chǎn)出,進(jìn)一步確認(rèn)有效厚度下限標(biāo)準(zhǔn)符合該地區(qū)實際地質(zhì)情況。
[Abstract]:This paper takes the Upper Paleozoic reservoir of Yanan gas extension 2-Yan 128 well area as an example, based on the previous research results, through the analysis of sedimentation and diagenesis, the use of logging data. Based on the basic geological data, core analysis data and actual production performance of oil field, the geological characteristics of Upper Paleozoic reservoir in Yanan gas extension well 2-Yan 128 area are discussed. The difficult problems such as lithology identification, complex pore structure and complex logging response characteristics of tight sandstone reservoirs in the study area are studied in this paper. The results and understandings are as follows: two types of sedimentary system, delta sedimentary system (Box 8), are mainly developed in the study area. The reservoir lithology mainly includes fine sandstone, medium sandstone, coarse sandstone, gravel coarse sandstone, fine conglomerate, medium conglomerate and sandy conglomerate. The main porosity is between 4.0 and 12.0, and the permeability is between 0.01m D and 3.0m. it is very low porosity. The types of diagenesis include mechanical compaction, pressure-solubilization, cementation and dissolution. The diagenetic evolution is complicated. The regression equation of measured porosity and sonic time difference is obtained by using acoustic moveout to establish each layer porosity chart. The porosity interpretation model is tested by the core analysis porosity, and the average relative error between the porosity treated by logging and the core analysis porosity after the logging is less than 7. The gas saturation is determined by closed coring and log interpretation, and the analytical interpretation model of gas saturation in each layer is established, and the lower limit of physical property and the lower limit of electric property of effective thickness in the study area are determined. At the same time, the lower limit standard is verified, and the gas production is found in all the layers that meet the lower limit requirement. It is further confirmed that the lower limit standard of effective thickness accords with the actual geological conditions in this area.
【學(xué)位授予單位】：西安石油大學(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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