本文選題：晉中區(qū)塊 + 地震資料解釋�。� 參考：《成都理工大學(xué)》2017年碩士論文

【摘要】：沁水盆地面積36000km~2,煤層氣勘探面積27100km~2,是我國原型盆地特征保留較好的聚煤盆地之一。盆地煤層氣產(chǎn)量豐厚,占比國內(nèi)總產(chǎn)量百分之九十三,占比全國資源總量高達十分之一,具有極高的勘探開發(fā)價值�，F(xiàn)階段的調(diào)查研究主要針對深度在2000米以上的淺層,其資源量為39500.42×10~8m3,然而,深度在2000米以下的資源量沒有探明,對于研究區(qū)的煤氣層以外常規(guī)天然氣的勘探尚未開展。就近年來新一輪煤層氣資源潛力評價結(jié)果和區(qū)內(nèi)能源氣體的開采形勢來看,盆地內(nèi)的天然氣資源具有很大的開采潛能。受華北地臺構(gòu)造演化影響,沁水盆地經(jīng)歷了早中侏羅世的擠壓褶皺和晚侏羅世-早白堊世的拉張裂陷以及白堊世-古近紀擠壓反轉(zhuǎn)三個構(gòu)造期次。研究區(qū)晉中區(qū)塊位于沁水盆地北部,主要構(gòu)造活動發(fā)生在燕山期。研究區(qū)構(gòu)造發(fā)育機制、斷層展布等是油氣成藏的保存條件和運移通道。研究首先進行精細構(gòu)造解釋,主要完成子波提取、制作合成記錄、層位標(biāo)定和追蹤、時深轉(zhuǎn)換、構(gòu)造成圖等工作。編制上石盒子組底,下石盒子組底,山西組底,太原組底共四個層位平面構(gòu)造圖。按工區(qū)斷裂分布及組合、構(gòu)造背景及演化、露頭條件,確定各主要斷層,將晉中區(qū)塊劃分為晉中斷陷、太古斜坡、榆社斜坡、武鄉(xiāng)凹陷四個構(gòu)造單元。其次根據(jù)工區(qū)內(nèi)構(gòu)造演化過程和區(qū)域構(gòu)造背景,建立構(gòu)造模擬實驗,與解釋工作相互驗證,分析工區(qū)內(nèi)構(gòu)造形成機制。構(gòu)造模擬實驗的本質(zhì)在于利用相似條件,模擬實際地質(zhì)構(gòu)造變形,研究構(gòu)造演化,成因以及動力學(xué)發(fā)展的一種沙箱模擬辦法。通過分析對比實驗現(xiàn)象,可以看出,早侏羅到中侏羅的NWW擠壓應(yīng)力對區(qū)內(nèi)斷裂的影響較大,SEE向擠壓應(yīng)力影響較弱;晚侏羅到早白堊時期的NWW拉張應(yīng)力對于晉中斷陷的形成有著決定性作用�？梢酝茰y在成藏主要時期(燕山期)受應(yīng)力和邊界條件影響最小的區(qū)域是榆社斜坡構(gòu)造帶。相比于其他幾個構(gòu)造單元,榆社斜坡遠離盆地邊界,受邊界條件影響最小;榆社斜坡位置靠東,受應(yīng)力條件影響也遠遜于其他構(gòu)造單元。對比二維地震資料解釋,榆社斜坡構(gòu)造相對穩(wěn)定。本課題充分發(fā)揮構(gòu)造模擬實驗的優(yōu)勢研究主要斷裂的演化過程,利用地震資料解釋分析次級斷裂特征和組合,結(jié)合兩者的優(yōu)勢,分析工區(qū)內(nèi)構(gòu)造發(fā)育機制。對比分析后認為,工區(qū)內(nèi)天然氣成藏的有利區(qū)帶在榆社斜坡構(gòu)造帶上,為盆地后續(xù)的勘探開發(fā)工作提供依據(jù)。
[Abstract]:The area of Qinshui basin is 36000km2, and the exploration area of coalbed methane is 27100km2. It is one of the best coal-accumulating basins in China. The coal-bed methane production in the basin is rich, accounting for 93% of the total domestic output and 1/10 of the total resources in China, which is of great value for exploration and development. At present, the investigation and research mainly focus on the shallow layer with a depth of more than 2000 meters, with a resource amount of 39500.42 脳 10 ~ (-8) m ~ (3). However, the amount of resources below 2000 meters has not been proved, and the exploration of conventional natural gas outside the gas layer in the study area has not been carried out. According to the new evaluation results of CBM resource potential in recent years and the exploitation situation of energy gas in this area, the natural gas resources in the basin have great potential for exploitation. Influenced by the tectonic evolution of North China platform, Qinshui Basin experienced three tectonic stages: early and Middle Jurassic compressional fold, late Jurassic-early Cretaceous extensional rift and Cretaceous Paleogene compressional inversion. Jinzhong block is located in the northern part of Qinshui basin and the main tectonic activity occurred in Yanshanian period. The mechanism of tectonic development and fault distribution in the study area are the preservation conditions and migration channels of oil and gas accumulation. Firstly, fine structure interpretation is carried out, including wavelet extraction, synthetic record making, horizon calibration and tracing, time-depth conversion, construction and mapping, and so on. The bottom of upper Shihezi formation, the bottom of lower Shihezi formation, the bottom of Shanxi formation and the bottom of Taiyuan formation are drawn up. According to the distribution and assemblage of faults, tectonic background and evolution, outcrop conditions, the main faults are determined, and the block of Jinzhong is divided into four structural units: Shanxi interrupt depression, Swire slope, Yushe slope and Wuxiang depression. Secondly, according to the process of tectonic evolution and the background of regional structure in the working area, the structural simulation experiment is established, which is verified with the interpretation work, and the formation mechanism of the structure in the working area is analyzed. The essence of structural simulation experiment is to use similar conditions to simulate the actual geological structural deformation and to study structural evolution, genesis and dynamic development of sandbox simulation method. Through the analysis and comparison of the experimental phenomena, it can be seen that the NWW extrusion stress from early Jurassic to Middle Jurassic has a greater effect on the fracture in the region than the SEE-oriented extrusion stress. The NWW tensile stress from late Jurassic to early Cretaceous stage plays a decisive role in the formation of Jin interrupt depression. It can be inferred that the area affected by stress and boundary conditions is the Yushe slope structural belt in the main period of reservoir formation (Yanshanian period). Compared with other structural units, Yushe slope is far from the boundary of the basin and is least affected by boundary conditions, and the position of Yushe slope is eastward, which is much less affected by stress conditions than other tectonic units. Comparing with the interpretation of two-dimensional seismic data, the structure of Yushe slope is relatively stable. This paper gives full play to the advantages of structural simulation experiments to study the evolution process of main faults, uses seismic data to interpret and analyze the characteristics and combinations of secondary faults, and combines the advantages of the two to analyze the development mechanism of structures in the working area. After comparative analysis, it is concluded that the favorable zone of natural gas accumulation in the work area is located in the structural belt of Yushe slope, which provides the basis for the further exploration and development of the basin.
【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】：2017
【分類號】：P618.13

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