柴達木盆地德令哈斷陷區(qū)巖溶發(fā)育及分布特征研究
本文選題:柴達木盆地 + 德令哈斷陷; 參考:《中國地質大學(北京)》2017年碩士論文
【摘要】:柴達木盆地油氣資源豐富,但石油天然氣的探明程度很低。研究者對該地區(qū)做了大量的油氣勘查工作。巖溶的發(fā)育和分布情況對于油氣勘查有著極大的幫助,在本人之前未見對研究區(qū)巖溶各個情況的詳細調查。本人全面地收集了德令哈斷陷地區(qū)地質、氣象、水文和水文地質等資料。通過自2014年起,三年期間共計78天的實地野外調查,對柴達木盆地東部的死狼溝地區(qū)、天天礦業(yè)礦區(qū)、石灰溝地區(qū)、巴音河岸附近地區(qū)及尕海南山地區(qū)發(fā)現的11個巖溶露頭,14個大型溶洞的所在位置、巖溶強度、巖溶厚度、控制裂隙等因素進行實地勘測,拍照,并進行詳細描述,取得了大量研究區(qū)內地表巖溶發(fā)育情況的詳細資料,整理了研究區(qū)內地表巖溶的分布位置。并通過所得資料對各個露頭的形成原因進行詳細分析。通過研究區(qū)內的野外調查,發(fā)現了三處巖溶泉露頭,并對三處泉水進行了詳細的描述和照片采集。對巖溶泉進行了取樣和水質分析實驗,測定了取得巖溶水的化學成分,并對分析結果進行分析,繪制水化學分類圖。分析結果表明,研究區(qū)內的巖溶泉礦化度都不高,大部分為淡水,部分為微咸水。三處巖溶泉都屬于HCO3·Ca型地下水。水中的主要成分來源是柏樹山地區(qū)大理巖內碳酸鈣和白云石的溶解。通過對鉆井巖芯的大量觀察對的兩哈斷陷附近的死狼溝、旺尕秀、尕海南山、柏樹山、穿山溝、宗務隆山等地區(qū)的地下巖溶做了詳細的描述,并標明了地下巖溶發(fā)育程度較好的鉆井深度和巖層層位。選取保存比較完好的部分巖芯進行取樣,通過孔隙度和滲透率室內試驗來研究其孔滲特征,得出了德令哈斷陷附近具有產生巖溶儲層條件的結論。本文對于德令哈斷陷附近的地表及地下巖溶及巖溶水的分布發(fā)育特點進行了詳細描述。為將來對于該研究區(qū)巖溶儲層的探明和巖溶水的開發(fā)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.
【學位授予單位】:中國地質大學(北京)
【學位級別】:碩士
【學位授予年份】:2017
【分類號】:P642.25;P618.13
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