高精度隨機反演方法研究及其在SLG氣田應(yīng)用
發(fā)布時間：2018-10-13 18:32
【摘要】：中國陸上巖性油氣藏探明儲量從20世紀90年代初占總探明儲量的20%逐步上升到目前的55%左右,顯示出巖性油氣藏在油氣開發(fā)中的重要地位。精細勘探將是影響油氣增儲上產(chǎn)的關(guān)鍵因素之一,而對于精細油氣勘探來說,高精度地震反演成果在油藏描述及油氣儲層預(yù)測等研究工作中發(fā)揮著越來越重要的作用,因為其反演結(jié)果能較真實地反映出地下的地質(zhì)構(gòu)造和儲層的巖性特征,可以大大提高鉆井的成功率。SLG氣田是中國陸地上發(fā)現(xiàn)的一個特大型氣田之一,屬于隱蔽性砂巖氣藏。其儲層具有氣層單層有效厚度薄、砂體橫向連續(xù)性較差,空間變化大、單層平面分布不穩(wěn)定,并且非均質(zhì)性較強、砂體沉積類型復(fù)雜等特點。為了對SLG地區(qū)隱蔽性砂巖氣藏的薄互層儲層進行精細分析研究,本文從常規(guī)確定性疊后反演方法到精細的高精度隨機反演方法進行了系統(tǒng)的分析,對反演過程中的關(guān)鍵技術(shù)和參數(shù)進行了詳細的研究,并在此基礎(chǔ)之上以研究區(qū)內(nèi)目的層段H8段為目標,在高精度反演結(jié)果上對砂體展布進行分析。取得了以下研究成果:1、在常規(guī)疊后反演的優(yōu)缺點分析與研究基礎(chǔ)上,通過對常規(guī)隨機方法的優(yōu)化和改進提出了一種高精度隨機反演方法,并對SLG氣田的地層劃分、沉積特征、儲層特征進行了全面的分析與總結(jié),結(jié)合其特點建立了一套適合于SLG氣田的反演流程;2、通過對疊后地震反演影響因素的研究和試驗,確定了影響反演結(jié)果的關(guān)鍵參數(shù),并對其精細分析,以保證反演的精確性;3、通過比較常規(guī)隨機反演方法與高精度隨機反演方法的反演結(jié)果,認為高精度隨機反演結(jié)果在SLG氣田有更好的效果;4、在高精度反演結(jié)果的基礎(chǔ)上,結(jié)合地質(zhì)認識,對SLG地區(qū)砂體分布特征進行了綜合分析,并通過單井砂體誤差分析進一步對高精度隨機反演結(jié)果可靠性進行驗證。綜上所述,高精度隨機反演在SLG氣田取得了不錯的應(yīng)用效果,提高儲層預(yù)測精度,具有重要的實際應(yīng)用價值。
[Abstract]:The proven reserves of onshore lithologic reservoirs in China have gradually increased from 20% of the total proven reserves in the early 1990s to about 55% at present, indicating the important position of lithologic reservoirs in oil and gas development. Fine exploration will be one of the key factors affecting the increase of oil and gas reservoir production. For fine oil and gas exploration, high-precision seismic inversion results play a more and more important role in reservoir description and oil and gas reservoir prediction. Because the inversion results can reflect the underground geological structure and lithologic characteristics of the reservoir, it can greatly improve the success rate of drilling. SLG gas field is one of the super large gas fields discovered on land in China, which belongs to the concealed sandstone gas reservoir. The reservoir is characterized by thin effective single layer thickness of gas reservoir, poor horizontal continuity of sand body, large spatial variation, unstable plane distribution of single layer, strong heterogeneity and complex sedimentary types of sand body. In order to analyze and study the thin interbed reservoir of concealed sandstone gas reservoir in SLG area, this paper makes a systematic analysis from the conventional deterministic poststack inversion method to the fine high-precision random inversion method. The key techniques and parameters in the inversion process are studied in detail. On the basis of this, the distribution of sand bodies is analyzed on the basis of the H8 section of the target layer in the study area. The results are as follows: 1. On the basis of the analysis and research of the advantages and disadvantages of conventional poststack inversion, a high-precision stochastic inversion method is proposed by optimizing and improving the conventional stochastic method, and the stratigraphic division and sedimentary characteristics of SLG gas field are also discussed. The reservoir characteristics are comprehensively analyzed and summarized, and a set of inversion processes suitable for SLG gas field are established according to their characteristics. 2. By studying and testing the influencing factors of post-stack seismic inversion, the key parameters affecting the inversion results are determined. In order to ensure the accuracy of the inversion, the inversion results of the conventional stochastic inversion method and the high-precision stochastic inversion method are compared. The results of high precision random inversion are considered to be more effective in SLG gas field. (4) on the basis of high precision inversion results, combined with geological understanding, the distribution characteristics of sand bodies in SLG area are comprehensively analyzed. The reliability of high precision random inversion results is further verified by single well sand body error analysis. To sum up, high precision random inversion has achieved good application effect in SLG gas field and improved reservoir prediction accuracy, which has important practical application value.
【學(xué)位授予單位】：成都理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P618.13;P631.4
本文編號：2269550
[Abstract]:The proven reserves of onshore lithologic reservoirs in China have gradually increased from 20% of the total proven reserves in the early 1990s to about 55% at present, indicating the important position of lithologic reservoirs in oil and gas development. Fine exploration will be one of the key factors affecting the increase of oil and gas reservoir production. For fine oil and gas exploration, high-precision seismic inversion results play a more and more important role in reservoir description and oil and gas reservoir prediction. Because the inversion results can reflect the underground geological structure and lithologic characteristics of the reservoir, it can greatly improve the success rate of drilling. SLG gas field is one of the super large gas fields discovered on land in China, which belongs to the concealed sandstone gas reservoir. The reservoir is characterized by thin effective single layer thickness of gas reservoir, poor horizontal continuity of sand body, large spatial variation, unstable plane distribution of single layer, strong heterogeneity and complex sedimentary types of sand body. In order to analyze and study the thin interbed reservoir of concealed sandstone gas reservoir in SLG area, this paper makes a systematic analysis from the conventional deterministic poststack inversion method to the fine high-precision random inversion method. The key techniques and parameters in the inversion process are studied in detail. On the basis of this, the distribution of sand bodies is analyzed on the basis of the H8 section of the target layer in the study area. The results are as follows: 1. On the basis of the analysis and research of the advantages and disadvantages of conventional poststack inversion, a high-precision stochastic inversion method is proposed by optimizing and improving the conventional stochastic method, and the stratigraphic division and sedimentary characteristics of SLG gas field are also discussed. The reservoir characteristics are comprehensively analyzed and summarized, and a set of inversion processes suitable for SLG gas field are established according to their characteristics. 2. By studying and testing the influencing factors of post-stack seismic inversion, the key parameters affecting the inversion results are determined. In order to ensure the accuracy of the inversion, the inversion results of the conventional stochastic inversion method and the high-precision stochastic inversion method are compared. The results of high precision random inversion are considered to be more effective in SLG gas field. (4) on the basis of high precision inversion results, combined with geological understanding, the distribution characteristics of sand bodies in SLG area are comprehensively analyzed. The reliability of high precision random inversion results is further verified by single well sand body error analysis. To sum up, high precision random inversion has achieved good application effect in SLG gas field and improved reservoir prediction accuracy, which has important practical application value.
【學(xué)位授予單位】：成都理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P618.13;P631.4
【參考文獻】
相關(guān)期刊論文 前4條
1 楊敏芳;楊瑞召;;隨機巖性反演在茂興地區(qū)薄儲層預(yù)測中的應(yīng)用[J];石油天然氣學(xué)報;2009年03期
2 劉勇江;鄧萍;;井約束地震反演在YB地區(qū)長興組的應(yīng)用[J];江漢石油科技;2012年04期
3 孫友權(quán);熊曉軍;羅鑫;王嘉;;高精度隨機反演方法及在蘇里格氣田的應(yīng)用[J];科學(xué)技術(shù)與工程;2014年32期
4 林功成;雷新華;張新;劉豪杰;徐宏節(jié);;隨機反演在薄儲層預(yù)測中的應(yīng)用——以長嶺斷陷登婁庫組為例[J];油氣地球物理;2012年04期
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