普光气田试井资料评价及产能变化规律研究

发布时间：2018-01-13 11:12

本文关键词：普光气田试井资料评价及产能变化规律研究　出处：《长江大学》2017年硕士论文　论文类型：学位论文

【摘要】：普光气田开采面积为1118平方公里,资源量为8916亿方,是我国已投产的规模最大、丰产最高的特大型海相整装气田,是国家川气东送工程的气源地,被列为国家“十一五”重点建设项目。普光气田坐落于四川达州宣汉县普光镇,川东地区规模最大、丰度最高的特大碳酸盐海相气田,缓解了目前国内用气紧张状况。其高含硫特性使得井下仪器易被腐蚀损坏,也使得许多压力测试工作面临困难。由于井下工作测压困难,所以很多工作的关键是采取什么样的测试方法比较可靠。根据国内外相关文献和实地情况研究成果,目前针对其特殊状况展开了多方面的研究。普光气田分为目前生产的是主体部分37口井,大湾地区10口井,毛坝地区4口井。在本文针对收集的井口压力数据和两口井的井底测压数据展开分析,通过对相关测试资料品质的评价来评估测试数据的准确程度,对此次关井期间压力恢复数据进行精细解释,测得表皮系数、储层地层参数及边界条件,同时结合区域生产历史产能数据及地层数据随生产的变化对普光气田试井的产能变化趋势进行分析和预测。目前项目研究的目标是,通过该项目研究,对不同类型测试的资料品质进行评价,对普光相关试井资料进行了精细解释和对比分析,利用一点法产能公式(1)针对相关测试资料进行解释及可靠性分析;(2)相关试井资料精细解释;(3)各项数据对产能变化的影响。针对井下高含硫问题,国内曾对生产测井工艺有大量的研究。2006年后开展了较大规模的测试施工,通过不断实践,取得了大量的现场应用经验,从而提高了试气测试工艺技术的发展水平,形成了一套川东北地区高温高压含硫天然气深井测试工艺配套技术。本次生产测试统计包括普光大湾毛坝共计31口井,共45份生产测井报告进行研究。通过对生产过程的分析对比得出所采用的数据的准确性。对于无法直接得出的井底压力,结合普光气田高含硫、受边水入侵影响的情况,针对井下高含硫问题,形成了一套川东北地区高温高压含硫天然气深井测试工艺配套技术。通过提出多种相关的确定地层压力的方法探究,对比实际生产数据和利用各种不同方法所得的井底压力数据,综合得出适合普光气田实际生产情况的测压方法。由于每口井的控制区域不同,利用不同的加权模型对井的控制区域进行讨论,根据区域空间分布和控制范围及各个井的压力随时间的变化关系,通过对直井和斜井的不同的变化规律分别进行分析,对比分析低部位高部位的影响因素,对比不同产量下的井的压降规律,得出区域产能和压力的变化趋势,并做出区域压力随产量的压降变化的压降分布图,指导区域整体开采规划。
[Abstract]:Puguang gas field, with an area of 1118 square kilometers and a resource of 891.6 billion square meters, is the largest and most productive marine gas field in China. It is also a gas source for the national gas transmission project from Sichuan to the east. Puguang gas field is located in Puguang town, Xuanhan county, Sichuan province, and the largest and most abundant carbonate marine gas field in east Sichuan. The high sulfur content makes the downhole instruments easy to be corroded and damaged, and makes many pressure testing work face difficulties, because of the underground pressure measurement difficulties. So the key of a lot of work is to adopt what kind of test method is more reliable. According to the domestic and foreign relevant literature and field situation research results. Puguang gas field is divided into 37 wells in main part and 10 wells in Dawan area. In this paper, according to the collected wellhead pressure data and the bottom hole pressure measurement data of two wells, the accuracy of test data is evaluated by evaluating the quality of relevant test data. The pressure recovery data during the shutoff period are interpreted carefully, and the epidermal coefficient, reservoir formation parameters and boundary conditions are obtained. At the same time, the trend of productivity change in Puguang gas field is analyzed and forecasted based on the regional production historical productivity data and formation data with the change of production. At present, the goal of the project is to study through the project. The data quality of different types of tests is evaluated, and the relevant well test data of Puguang are interpreted and contrasted. The one-point productivity formula is used to interpret and analyze the reliability of the relevant test data. 2) fine interpretation of relevant well test data; In view of the problem of high sulfur content in downhole, there has been a lot of research on production logging technology in China. After 2006, a large scale test operation was carried out, through continuous practice. A large number of field application experience has been obtained, thus improving the development level of gas test technology. A set of deep well test technology for high temperature and high pressure sulfur-bearing natural gas in northeast Sichuan has been formed. The production test statistics include 31 wells in Puguang Bay Maoba. A total of 45 production logging reports were studied. Through the analysis and comparison of the production process, the accuracy of the adopted data was obtained. For the bottomhole pressure, which could not be directly obtained, combined with the high sulfur content in Puguang gas field. Under the influence of edge water invasion, the problem of high sulfur content in underground is pointed out. A set of technology for deep well testing of high temperature and high pressure sulfur-bearing natural gas in northeast Sichuan is formed. By comparing the actual production data with the bottom hole pressure data obtained by various different methods, the pressure measurement method suitable for the actual production situation of Puguang gas field is obtained synthetically, because the control area of each well is different. Different weighted models are used to discuss the control area of the well. According to the spatial distribution and control range of the well and the relationship between the pressure of each well with time. Through the analysis of the different variation laws of the vertical well and the inclined well, the influence factors of the high part in the low position and the pressure drop law of the well under the different production rate are compared, and the change trend of the regional productivity and pressure is obtained. And the regional pressure with the pressure drop of output pressure distribution map to guide the overall regional mining planning.
【学位授予单位】：长江大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE373

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