應(yīng)用水平井的儲(chǔ)層地質(zhì)建模方法研究
本文選題:水平井區(qū) + 地質(zhì)知識(shí)庫; 參考:《西安石油大學(xué)》2015年碩士論文
【摘要】:奧里諾科重油帶M區(qū)Morichal段儲(chǔ)層為砂質(zhì)辮狀河沉積,以水平井為主要開發(fā)方式。水平井測(cè)井資料具有橫向的地質(zhì)信息,與直井測(cè)井資料相比,其可以描述儲(chǔ)層巖性及物性參數(shù)在平面上的變化特征。水平井測(cè)井資料在空間上的分布及同一地層內(nèi)的數(shù)據(jù)量與直井有較大差別,基于此,論文對(duì)如何應(yīng)用水平井測(cè)井資料進(jìn)行地質(zhì)建模展開研究。首先,利用測(cè)井資料、地震資料、現(xiàn)代露頭沉積測(cè)量描述研究區(qū)辮狀河沉積相分布特征。在沉積相分布特征的基礎(chǔ)上,應(yīng)用基于目標(biāo)的模擬方法建立具有數(shù)字化特征的辮狀河沉積模式。其次,基于井震結(jié)合的建模思想,論文采用多點(diǎn)地質(zhì)統(tǒng)計(jì)學(xué)的建模方法,通過三維地震波阻抗數(shù)據(jù)體約束沉積相模型;谙嗫亟5乃枷,論文采用序貫高斯的建模方法,通過沉積相模型約束儲(chǔ)層物性參數(shù)模型。最后,通過多種模型驗(yàn)證方法檢驗(yàn)?zāi)P偷暮侠硇约熬。由于水平井(dāng)?shù)據(jù)具有地層橫向確定的地質(zhì)信息,在描述地層橫向地質(zhì)特征方面較直井?dāng)?shù)據(jù)有很大優(yōu)勢(shì)。但是,由于水平井鉆井過程中應(yīng)用地質(zhì)導(dǎo)向技術(shù)規(guī)避泥巖,水平井?dāng)?shù)據(jù)會(huì)導(dǎo)致地質(zhì)建模結(jié)果失真。針對(duì)應(yīng)用水平井?dāng)?shù)據(jù)進(jìn)行地質(zhì)建模的兩個(gè)困難點(diǎn),論文提出了相應(yīng)的解決辦法。在沉積相建模的過程中,應(yīng)用地震數(shù)據(jù)體約束沉積相趨勢(shì),保證沉積相在平面上和縱向上的分布趨勢(shì)正確。在屬性建模的過程中,利用只用直井?dāng)?shù)據(jù)變差函數(shù)分析的結(jié)果約束屬性參數(shù)分布趨勢(shì),保證屬性參數(shù)的分布趨勢(shì)和連續(xù)性與物源方向一致。通過多種模型驗(yàn)證方法檢驗(yàn)?zāi)P偷慕Y(jié)果表明,論文所建立的水平井開發(fā)區(qū)的沉積相模型和滲透率模型不確定性小,模型精度較高。因此論文提出的針對(duì)應(yīng)用水平井?dāng)?shù)據(jù)進(jìn)行地質(zhì)建模的方法可靠性高,對(duì)同類型水平井開發(fā)區(qū)的地質(zhì)建模工作具有重要借鑒意義。
[Abstract]:The reservoir of Morichal member in M area of Orinoco heavy oil belt is sandy braided river deposit, and horizontal well is the main development mode. The horizontal well logging data have horizontal geological information, which can describe the variation characteristics of reservoir lithology and physical parameters in the plane compared with the straight well logging data. The spatial distribution of horizontal well logging data and the amount of data in the same formation are quite different from that in the vertical well. Based on this, this paper studies how to use the horizontal well logging data for geological modeling. Firstly, the distribution characteristics of braided river sedimentary facies in the study area are described by logging data and seismic data. Based on the characteristics of sedimentary facies distribution, a model of braided river deposition with digital characteristics is established by means of object-based simulation. Secondly, based on the idea of combining well and earthquake, this paper adopts the modeling method of multi-point geostatistics, and uses three-dimensional seismic wave impedance data to constrain sedimentary facies model. Based on the idea of facies control modeling, this paper adopts sequential Gao Si modeling method and constrains reservoir physical parameters model by sedimentary facies model. Finally, the rationality and accuracy of the model are verified by various models. Because horizontal well data have geological information of horizontal determination of formation, it has a great advantage over straight well data in describing horizontal geological characteristics of formation. However, due to the application of geological guidance technology to avoid mudstone during horizontal well drilling, the horizontal well data will lead to the distortion of geological modeling results. Aiming at the two difficult points of applying horizontal well data to geological modeling, the corresponding solutions are put forward in this paper. In the process of sedimentary facies modeling, seismic data bodies are used to constrain the sedimentary facies trend to ensure the correct distribution trend of sedimentary facies on the plane and longitudinally. In the process of attribute modeling, the distribution trend of attribute parameters is restricted by using the result of variation function analysis of vertical well data to ensure that the distribution trend and continuity of attribute parameters are consistent with the direction of source. The results show that the sedimentary facies model and permeability model of horizontal well development zone established in this paper have less uncertainty and higher precision. Therefore, the method of geological modeling based on horizontal well data proposed in this paper has high reliability, and has important reference significance for geological modeling work of the same type horizontal well development zone.
【學(xué)位授予單位】:西安石油大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2015
【分類號(hào)】:TE243;P628.3
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