本文選題：煤層氣　切入點(diǎn)：疊前AVO反演　出處：《中國(guó)地質(zhì)大學(xué)(北京)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著國(guó)民經(jīng)濟(jì)的快速發(fā)展,我國(guó)常規(guī)的油氣田資源已經(jīng)滿足不了日益增長(zhǎng)的經(jīng)濟(jì)和生活需求。所以,非常規(guī)能源煤層氣引起了業(yè)內(nèi)人士更多的關(guān)注。迄今為止,我國(guó)煤層氣的抽采量只占了總資源量相對(duì)較少的一部分,大部分集中在構(gòu)造地質(zhì)背景簡(jiǎn)單的沁水盆地與鄂爾多斯的東緣區(qū)塊高階煤。研究區(qū)Q區(qū)塊的煤炭資源較豐富、熱演化程度也較高,但是在煤層氣的勘探開(kāi)采過(guò)程中,發(fā)現(xiàn)單井產(chǎn)量偏低,且穩(wěn)產(chǎn)期較短。因此,快速尋求檢測(cè)煤層氣的儲(chǔ)層預(yù)測(cè)研究方法刻不容緩。本文是通過(guò)疊前多屬性綜合研究方法進(jìn)行預(yù)測(cè),找出研究區(qū)內(nèi)較為富集的有利煤儲(chǔ)層區(qū)域。針對(duì)研究區(qū)斷裂系統(tǒng)進(jìn)行重新整理、組合及分析,并基于二維地震剖面的精細(xì)構(gòu)造解釋完成下石盒子組的駱駝脖子砂巖頂面、3#煤層頂面、15#煤層頂面、奧陶系的灰?guī)r頂面層位的構(gòu)造圖編制,落實(shí)構(gòu)造圈閉的數(shù)量和面積。再結(jié)合研究區(qū)縱橫波測(cè)井資料,分析出3#煤層測(cè)線曲線“三高兩低”的儲(chǔ)層特性,并對(duì)聲波和密度曲線進(jìn)行井曲線的標(biāo)準(zhǔn)化;完成工區(qū)探井的巖石物理參數(shù)正演,優(yōu)選出與工區(qū)最為匹配的巖石物理正演的模型,即Xu-White模型,通過(guò)Xu-White模型進(jìn)行流體置換來(lái)構(gòu)建橫波資料曲線。從疊前多屬性分析煤層氣有利富集區(qū)的范圍,包括疊前AVO屬性分析、疊前AVO縱橫波聯(lián)合反演和疊前FVO反演。綜合獲得的截距、梯度、擬泊松比、流體因子、疊前AVO與FVO的剖面、平面圖進(jìn)行疊合與流體展布特征的預(yù)測(cè),定量地劃分煤層氣的富集區(qū),研究結(jié)果與地震剖面、實(shí)際測(cè)井及地質(zhì)資料較為符合。本文重點(diǎn)針對(duì)3#煤層進(jìn)行疊前多屬性綜合分析,再結(jié)合目的層的物性、含氣性、圈閉背景,定量地劃分煤層氣的富集區(qū),形成一套綜合地震屬性、疊前AVO縱橫波聯(lián)合反演及疊前FVO屬性的研究技術(shù)流程及思路,為類似地區(qū)的勘探開(kāi)采積累了經(jīng)驗(yàn)并提供較好的研究思路。
[Abstract]:With the rapid development of the national economy, the conventional oil and gas field resources in China have been unable to meet the increasing economic and living needs. Therefore, unconventional energy coal bed methane has attracted more attention from the industry. Up to now, The extraction of coalbed methane in China accounts for only a relatively small part of the total resources, most of which are concentrated in the Qinshui basin with simple tectonic geological background and the high-order coal in the eastern margin of Ordos. The Q block is rich in coal resources. The thermal evolution is also relatively high, but in the process of exploration and exploitation of coalbed methane, it is found that the production of single well is on the low side and the period of stable production is relatively short. It is urgent to search for the reservoir prediction method to detect coalbed methane quickly. In this paper, the prestack multi-attribute comprehensive research method is used to predict the reservoir prediction. To find out the favorable coal reservoir area in the study area, to rearrange, combine and analyze the fault system in the study area, Based on the fine structure interpretation of 2-D seismic profile, the structural map of the top surface of the Camel neck sandstone top of the Camel neck sandstone and the top of the limestone roof of the Ordovician is compiled on the basis of the fine structural interpretation of the 2-D seismic profile. The number and area of structural traps are carried out, and the reservoir characteristics of "three high and two low" logging curves are analyzed based on the longitudinal and shear wave logging data in the study area, and the acoustic and density curves are standardized. The forward modeling of the rock physical parameters of the exploration well in the working area is completed, and the model of rock physics forward modeling, that is, the Xu-White model, which is the best match between the work area and the exploration well, is selected. The shear wave data curve is constructed by fluid replacement with Xu-White model. The range of prestack AVO attribute analysis, prestack AVO P-S wave inversion and prestack FVO inversion are analyzed from prestack multi-attribute analysis. Gradient, pseudo-Poisson 's ratio, fluid factor, prestack AVO and FVO profiles, plane maps to predict superposition and fluid distribution characteristics, quantitative division of coalbed methane rich areas, the results and seismic profiles, The actual logging and geological data are in good agreement. In this paper, the prestack multi-attribute comprehensive analysis is carried out in order to quantitatively divide the rich areas of coalbed methane in combination with the physical properties, gas-bearing properties and trap background of the target layer. A set of synthetic seismic attributes, prestack AVO P-S wave inversion and prestack FVO attributes are formed, which have accumulated experience and provided better research ideas for exploration and mining in similar areas.
【學(xué)位授予單位】：中國(guó)地質(zhì)大學(xué)(北京)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：P631.4

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