松辽盆地北部水溶气富集条件及其资源潜力

发布时间：2018-06-02 04:51

  本文选题：松辽盆地北部 + 水溶气特征　； 参考：《东北石油大学》2017年硕士论文

【摘要】：本文在松辽盆地北部地区富含水溶气的地热井采集地层水样和天然气样,进行地球化学分析测试,确定地层水化学特征、天然气类型及组分特征;针对不同水溶气发育层系分别建立水溶气测井识别图版,开展老井测井资料重新处理与解释,确定水溶气富集区域,并优选5口富含水溶气的地热井进行系统观测,获得每口井天然气溶解量;利用油田地质、物探、测井、钻探等资料,分析水溶气富集地质条件;利用储层资料,计算储层水资源量,最后根据水溶气丰度值及储层水资源量计算研究区水溶气资源量。本次研究取得以下几点结论与认识:(1)为了确定水溶气的类型及组分特征,在研究区富含水溶气的地热井采集天然气样,进行地球化学分析测试,分析结果表明,松辽盆地北部地区水溶气成分主要是甲烷,含量为81.74%~92.5%,绝大多数甲烷系数在0.90以上,具有干气的特征,甲烷碳同位素在-75‰~-55‰,类型主要为生物成因气。(2)优选区块建立的测井解释方法能够较好的识别储层流体性质,不仅能较好的识别气水层,对于三相流体同时存在的情况,能够在先区分出含油层的基础上,再识别气水层。解释图版的符合率均达到95.4%以上,达到了对优选区块流体性质进行评价的目的。(3)在确定研究区域水溶气发育区的基础上,针对不同水溶气发育层系分别建立了识别水溶气的方法,优选水溶气井进行测井资料的重新处理和二次解释,明确了泰康隆起杜24区块及龙虎泡阶地塔161区块具有较好的水溶气资源。(4)收集整理富含水溶气的地热井资料,优选5口典型地热井进行系统抽水观察及测试,目的在于获得每口井天然气溶解量,测试结果均见到较好的水溶气显示,日产气量在190~690m3之间。(5)通过水溶气井口测试及各套气源岩生气量评价,确定水溶气丰度主要在0.05~0.35m3/t之间。松辽盆地北部地区水溶气丰度高值主要分布在汤池、杜蒙、林甸、安达、长春岭南地区,为水溶气较发育区。(6)利用水溶气丰度以及各储层水资源量结果,对松辽盆地北部姚二三段、姚一段、青二三段、泉三四段储层进行了水溶气资源量计算。计算结果显示,松辽盆地北部非探区水溶气总资源量约为2614.19×108m3,表明松辽盆地北部具有丰富的水溶气资源。
[Abstract]:In this paper, the formation water samples and natural gas samples are collected from the geothermal wells rich in water-soluble gas in the northern part of Songliao Basin, and the geochemical analysis and test are carried out to determine the chemical characteristics of formation water, the types of natural gas and the composition characteristics. In view of the different water-soluble gas development layers, the water dissolved gas logging identification chart was established, the old well logging data were reprocessed and interpreted, the water-soluble gas enrichment area was determined, and five geothermal wells rich in water-soluble gas were selected for systematic observation. To obtain the dissolved amount of natural gas in each well, to analyze the geological conditions of water-soluble gas enrichment by using the data of oil field geology, geophysical exploration, logging and drilling, and to calculate the amount of reservoir water resources by using reservoir data, Finally, the amount of water-soluble gas is calculated according to the abundance of water-soluble gas and reservoir water resources. In order to determine the type and component characteristics of water-soluble gas, natural gas samples were collected from geothermal wells rich in water-soluble gas in the study area, and geochemical analysis and tests were carried out. In the northern part of Songliao Basin, the main component of water-soluble gas is methane, the content of which is 81.74% and 92.5%. Most of the methane coefficient is above 0.90, which has the characteristics of dry gas, and the carbon isotope of methane is from -75 鈥，

本文编号：1967489