柴达木盆地德令哈断陷区岩溶发育及分布特征研究

发布时间：2018-06-18 02:18

本文选题：柴达木盆地 + 德令哈断陷　；参考：《中国地质大学(北京)》2017年硕士论文

【摘要】：柴达木盆地油气资源丰富,但石油天然气的探明程度很低。研究者对该地区做了大量的油气勘查工作。岩溶的发育和分布情况对于油气勘查有着极大的帮助,在本人之前未见对研究区岩溶各个情况的详细调查。本人全面地收集了德令哈断陷地区地质、气象、水文和水文地质等资料。通过自2014年起,三年期间共计78天的实地野外调查,对柴达木盆地东部的死狼沟地区、天天矿业矿区、石灰沟地区、巴音河岸附近地区及尕海南山地区发现的11个岩溶露头,14个大型溶洞的所在位置、岩溶强度、岩溶厚度、控制裂隙等因素进行实地勘测,拍照,并进行详细描述,取得了大量研究区内地表岩溶发育情况的详细资料,整理了研究区内地表岩溶的分布位置。并通过所得资料对各个露头的形成原因进行详细分析。通过研究区内的野外调查,发现了三处岩溶泉露头,并对三处泉水进行了详细的描述和照片采集。对岩溶泉进行了取样和水质分析实验,测定了取得岩溶水的化学成分,并对分析结果进行分析,绘制水化学分类图。分析结果表明,研究区内的岩溶泉矿化度都不高,大部分为淡水,部分为微咸水。三处岩溶泉都属于HCO3·Ca型地下水。水中的主要成分来源是柏树山地区大理岩内碳酸钙和白云石的溶解。通过对钻井岩芯的大量观察对的两哈断陷附近的死狼沟、旺尕秀、尕海南山、柏树山、穿山沟、宗务隆山等地区的地下岩溶做了详细的描述,并标明了地下岩溶发育程度较好的钻井深度和岩层层位。选取保存比较完好的部分岩芯进行取样,通过孔隙度和渗透率室内试验来研究其孔渗特征,得出了德令哈断陷附近具有产生岩溶储层条件的结论。本文对于德令哈断陷附近的地表及地下岩溶及岩溶水的分布发育特点进行了详细描述。为将来对于该研究区岩溶储层的探明和岩溶水的开发和利用做基石。
[Abstract]:The Qaidam Basin is rich in oil and gas resources, but the degree of oil and gas exploration is very low. Researchers have done a great deal of oil and gas exploration in this area. The development and distribution of karst is of great help to oil and gas exploration. I have collected the data of geology, meteorology, hydrology and hydrogeology in Delingha fault area. Based on the field investigation of 78 days in the three years from 2014 to 2014, the paper studied the Deilanggou area in the eastern part of the Qaidam Basin, the mining area of Tiantian mining area and the Limegou area. The 11 karst outcrops and the location of 14 large caverns, karst intensity, karst thickness, controlling fissures and other factors found near the Bayin River and the Gahai Nanshan area were investigated, photographed, and described in detail. A large number of detailed data on the development of surface karst in the study area have been obtained, and the distribution of surface karst in the study area has been sorted out. Through the data obtained, the causes of each outcrop are analyzed in detail. Through field investigation in the study area, three karst springs were found, and the three springs were described and photographed in detail. The chemical composition of karst water was determined by sampling and water quality analysis experiments. The analysis results were analyzed and the classification map of water chemistry was drawn. The results show that the mineralization degree of karst springs in the study area is not high, most of them are fresh water and some are brackish water. All three karst springs belong to HCO 3 Ca type groundwater. The main source of composition in the water is the dissolution of calcium carbonate and dolomite in marble in the Boshushan area. Through a large number of observations of the drilling cores, the underground karst in the areas near the Liangha fault depression, such as the Dewolf ditch, Wanggaxiu, Gahai Nanshan, Boshushan, Chuanshangou, Zongwu Longshan, etc., are described in detail. The drilling depth and rock strata of underground karst are also indicated. Some well-preserved cores are selected for sampling and the porosity and permeability are studied by laboratory tests. The conclusion is drawn that there are karst reservoir conditions in the vicinity of Delingha fault depression. This paper describes in detail the distribution and development of surface and underground karst and karst water near the Delingha fault depression. It is the foundation stone for the exploration of karst reservoir and the exploitation and utilization of karst water in the future.
【学位授予单位】：中国地质大学(北京)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P642.25;P618.13

【相似文献】