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 natural gas reserves exist in low permeability oil and gas reservoirs, especially in our country. The low permeability natural gas resources in China are about 12 x 1012m~3. By the end of 2011, the cumulative proven recoverable reserves of low permeability natural gas have accounted for about 40 of the National Natural Gas reserves. Since 2011, the low permeability natural gas production has become my own. West Lake sag, an important area in the exploration and development of natural gas in China, is located in the East China Sea area southeast of Shanghai, with an area of about 5.9 x 104km~2 and a maximum thickness of more than 10km. Low porosity and permeability reservoirs are widely developed in the West Lake sag of the East China Sea basin. The potential of oil and gas resources is huge and has a very good prospect for exploration. Because West Lake sag belongs to low permeability gas reservoir. In the process of testing, the flow capacity of the low permeability gas reservoir is low, and it takes a long time to enter the radial flow stage, and all the test wells in the West Lake sag are shorter in the test process, and the flow in the reservoir in some well is terminated in the radial flow stage. This paper is based on the well test method of the same type gas field in the country and outside the country. On the basis of the test data, the evaluation of single well test data is carried out on the basis of the test data, based on the seepage mechanics and the well test theory basis, and the oil, gas well testing and dynamic parameter characteristics evaluation in the target area are deeply analyzed, and the short time well test capital is studied. On the basis of oil and gas well test data evaluation, the method of material interpretation and evaluation is further studied in the low permeability reservoir test interpretation in West Lake sag. The following points are obtained: 1, the fine interpretation of the pressure test data of 20 wells in the low permeability gas reservoir of the depression is completed, and on the basis of the detailed interpretation results of the comprehensive analysis test data. The test curve type and interpretation model of low permeability gas reservoir in West Lake sag are classified reasonably: homogeneous model, radial compound model, fracture model and boundary reaction model.2. From the actual interpretation results, the reservoir rationality is evaluated in West Lake sag concrete block. The reservoir of the west slope is the best, followed by the central reverse zone in the north, the most important. The software of the project completed with the low permeability reservoir test method of "West Lake depression" is written. The software is compiled in the Delphi language. The software has a clear visual interface and can handle a large number of data. In addition to the conventional analysis, a module for the early test data processing method for low permeability reservoirs is developed, and the test is designed for the test of low permeability reservoirs at the same time. In the process design, a special module has been compiled for calculating the induced pressure.
【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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