滇东北地区下古生界页岩气储层特征与资源潜力研究

发布时间：2018-06-03 00:01

本文选题：页岩气 + 储层　；参考：《昆明理工大学》2015年硕士论文

【摘要】：下古生界筇竹寺组与龙马溪组是我国南方海相页岩气勘探开发的主要产能层系,具有横向展布范围广、纵向厚度大、连续性好、有机碳含量及热演化程度高、孔隙发育、脆性好等特征,资源潜力巨大。论文以滇东北昭通地区下古生界海相页岩为研究对象,通过资料收集整理、野外地质调查、实验测试分析等手段,从地质背景、沉积环境、源岩-储层特征、赋存特征与保存条件四个方面,对页岩气储层特征、资源潜力进行了分析,并预测有利区,得出如下成果与认识：(1)筇竹寺组系深水陆棚相沉积,平均厚度在200m-400m范围内,埋深在3000～4500m左右。龙马溪组系浅水陆棚相沉积,平均厚度为l00m,最大可达350m。北部的绥江县、东部的威信县地区埋深皆大于3000m,而中部盐津县及大关县龙马溪组埋深在2000m以内。(2)两套页岩热演化程度高,二者均处于过成熟阶段。(3)筇竹寺组脆性矿物含量大于龙马溪组,龙马溪组粘土矿物含量大于筇竹寺组,龙马溪组碳酸盐矿物含量大于筇竹寺组。(4)下古生界页岩发育丰富孔裂隙,主要孔隙类型为粒内孔、晶间孔、粒间孔和有机质孔等类型。压汞实验表明过渡孔及微孔是组成筇竹寺组与龙马溪组页岩孔隙的主要部分。(5)两套页岩在地质历史时期经历了深埋作用,已进入成岩作用后期,其粘土矿物主要为伊/蒙混层及伊利石,且含有经系列矿物转化后的绿泥石,矿物转化形成的孔隙大量发育,岩石中也有裂缝发育,可以为页岩气赋存提供有效空间。(6)滇东北页岩气有利区资源量为6188.9×108m3；滇东北页岩气远景区资源量为4736.74×108m3；滇东北页岩气预测区资源量为14800.15×108m3。论文字数约5.3万,图件69幅,表格27张。
[Abstract]:The Lower Paleozoic Qiongzhusi formation and Longmaxi formation are the main productivity strata for marine shale gas exploration and development in southern China, with wide horizontal distribution, large longitudinal thickness, good continuity, high organic carbon content and thermal evolution, and pore development. Brittleness is good and has great potential for resources. This paper takes the Lower Paleozoic marine shale in Zhaotong area, northeastern Yunnan Province as the research object. By means of data collection, field geological investigation, experimental test and analysis, the paper analyzes the geological background, sedimentary environment, source rock-reservoir characteristics, and so on. In this paper, the characteristics and resource potential of shale gas reservoir are analyzed in four aspects of occurrence characteristics and preservation conditions, and the favorable areas are forecasted. The results and understandings are as follows: 1) Qiongzhusi formation Deep-water shelf facies deposits, the average thickness of which is within the range of 200m-400m. The depth of burying is about 3000m ~ 4500m. The shallow water shelf facies of Longmaxi formation are deposited with an average thickness of 100 m and the maximum thickness of 350 m. In Suijiang County in the north and Weixin County in the east, the buried depth is more than 3000m, while the buried depth of Longmaxi formation in the central Yanjin County and Daguan County is within 2000m. The brittle mineral content of Qiongzhusi formation is higher than that of Longmaxi formation, the clay mineral content of Longmaxi formation is higher than Qiongzhusi formation, and the carbonate mineral content of Longmaxi formation is higher than Qiongzhusi formation. The main pore types are intragranular pore, intergranular pore and organic pore. Mercury injection experiments show that the transition pore and micropore are the main part of shale pore in Qiongzhusi formation and Longmaxi formation. The two sets of shale have experienced deep burial in geological history and have entered the late diagenesis stage. The clay minerals are mainly composed of Iraq / Mongolia layer and Illite, and contain chlorite after the series of minerals have been transformed. The pores formed by mineral transformation are abundant and the cracks are also developed in the rocks. It can provide effective space for the occurrence of shale gas.) the resources of the favorable area of shale gas in northeast Yunnan is 6188.9 脳 10 8 m 3, the resource amount of shale gas remote area in northeast Yunnan is 4736.74 脳 10 8 m 3, and the resource quantity of shale gas prediction area in northeast Yunnan is 14800.15 脳 10 8 m 3. The paper has about 53000 words, 69 pictures and 27 tables.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13

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