西湖凹陷低渗气层试井解释方法综合研究

发布时间：2018-05-20 23:22

本文选题：西湖凹陷 + 低渗透率气藏　；参考：《长江大学》2017年硕士论文

【摘要】：世界上一半的石油天然气储量存在于低渗透油气藏中,我国情况尤其如此,我国低渗天然气资源量约为12×1012m~3,截止2011年底低渗天然气累计探明可采储量已占全国天然气探明储量的40㳠左右。从2011年开始,低渗天然气产量已经成为我国天然气勘探开发的重要领域。西湖凹陷位于上海市东南方向的东海海域,面积约为5.9×104km~2,沉积最大厚度超过10km,东海盆地西湖凹陷普遍发育低孔渗油气藏,油气资源潜力巨大,具有非常好的勘探前景。由于西湖凹陷属于低渗透气藏,在测试过程中低渗透气藏流动能力低,进入径向流阶段所需时间较长,而西湖凹陷所有测试井在测试过程中测试时间都较短,部分井中储层内的流动为进入径向流阶段就终止测试,本文是在调研国内外同类型气田的试井方法的基础上,分析目标区试井成功的做法、资料存在的问题、压力响应特征等高产油、气井试井资料特点;在测试资料基础上,根据渗流力学及试井理论基础,开展单井测试资料评价,深入分析目标区油、气井测试及动态参数特征评价;研究短时试井资料解释评价方法,在油、气井测试资料评价基础上,进一步对西湖凹陷低渗气层试井解释进行研究。主要取得了以下几点认识:1、通过完成西湖凹陷低渗气层20口井的压力测试资料的精细解释,在综合分析测试资料精细解释结果基础上,对西湖凹陷低渗气层测试曲线类型和解释模型进行了合理的分类:均质模型、径向复合模型、裂缝型模型、边界反应模型。2、从实际解释结果看,对西湖凹陷具体区块进行了储层合理性评价:西斜坡储层物性最好,其次为中央反转带中北部,最差的为西次凹。3、编写了配合《西湖凹陷低渗气层试井方法研究》项目完成的软件,该软件采用delphi语言编制,具有清晰的可视化界面,可以处理大量的数据。除了常规分析,还专门编制了低渗储层早期测试数据处理方法模块,同时针对测试工艺设计中,诱喷压力计算编写了专门的模块。
[Abstract]:Half of the world's oil and gas reserves exist in low-permeability oil and gas reservoirs, especially in China. The amount of low-permeability natural gas resources in China is about 12 脳 1012mm3. By the end of 2011, the cumulative proven recoverable reserves of low-permeability natural gas have accounted for 40% of the proven reserves of natural gas in China. Left and right. Since 2011, low permeability natural gas production has become an important field of natural gas exploration and development in China. Xihu sag is located in the sea area of the East China Sea southeast of Shanghai with an area of about 5.9 脳 10 ~ 4km ~ (-2) and a maximum thickness of more than 10km. The Xihu sag in the East China Sea basin generally develops low porosity and permeability reservoirs, which has a great potential for oil and gas resources and has a very good prospect for exploration. Because Xihu sag belongs to low permeability gas reservoir, the flow ability of low permeability gas reservoir is low during the test, and the time to enter radial flow stage is longer, while all test wells in Xihu sag have shorter test time during testing. The flow in some wells terminates testing in order to reach the radial flow stage. Based on the investigation of the well testing methods of the same type gas fields at home and abroad, this paper analyzes the successful well testing methods and the problems existing in the data in the target area. On the basis of test data, according to percolation mechanics and well test theory, the evaluation of single well test data is carried out, and the oil, gas well testing and performance parameter characteristic evaluation in target area are deeply analyzed. Based on the evaluation of oil and gas well testing data, the interpretation of low permeability gas reservoir in Xihu sag is further studied. The main achievements are as follows: 1. By completing the fine interpretation of the pressure test data of 20 wells in low permeability gas reservoirs in Xihu sag, and on the basis of comprehensive analysis of the fine interpretation results of the test data, The types of test curves and interpretation models for low permeability gas reservoirs in Xihu sag are reasonably classified: homogeneous model, radial composite model, fracture model, boundary reaction model. The reservoir rationality of the specific blocks in Xihu sag is evaluated: the reservoir physical properties of the west slope are the best, followed by the central inversion zone, The worst one is Xisubconcave. 3. The software is developed to cooperate with the project of well testing method of low permeability gas reservoir in Xihu sag. The software is compiled with delphi language, and has a clear visual interface, which can deal with a lot of data. In addition to conventional analysis, the module of early testing data processing for low permeability reservoir is developed, and a special module is developed for the calculation of induced pressure in test process design.
【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】：TE53

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