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Characterizing multi-layer reservoirs using a fast computational simulator and a new environmentally sensitive pre-production well test.

机译：使用快速计算模拟器和新的对环境敏感的试井测试来表征多层油藏。

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摘要

In this work, we address the needs of the industry, especially in the North Sea reservoirs and environmentally fragile areas, for a simple, inexpensive and environmentally sensitive technology to characterize and model multi-layer reservoirs with unequal initial pressures.; We present the general solution in Laplace space for a commingled reservoir with unequal initial pressures. We derived the Laplace space solution in terms of individual layer source/Green's functions. We used the Green's function to handle the inhomogenous initial boundary conditions resulting from the effects of unequal initial pressures.; We developed a fast semi-analytical simulator, MLSIM, for modeling multi-layer reservoir performance including pre-production, constant rate drawdown for layers with equal initial pressures, and constant rate drawdown for layers with unequal initial pressures. The reservoir performance information available from this model includes wellbore pressures, pressure derivatives, individual layer flowrates, and layer cumulative production. The semi-analytical simulator proved to be faster than a conventional three-dimensional, finite-difference commercial simulator. Also the amount of information needed to run the model is much reduced.; We designed a new pre-production well-test, PPWT, for analyzing a commingled reservoir with unequal initial pressures. The pre-production well test needs only a pressure gauge above the top layer. This test reduces cost and time substantially compared to conventional multi-layered testing techniques. Also, as there is no production on the surface, the new well test is well suited for offshore wells or for testing wells in environmentally sensitive areas.; We developed analysis techniques and methodology to analyze the PPWT performance. The Modified Semilog Method, MSM, analyzes the pressure data from two-layer infinite-acting reservoirs to determine the fractional mobility-thickness ratio. The Derivative Extreme Method, DEM, has the advantage of determining the individual layer properties and not the ratios of properties from the transient and late-transient time region data. The Integrated Modified Derivative Extreme Method, IMDEM, determines the layer drainage areas in addition to the layer permeabilities and layer skin factors. The Rate Normalized Method, RNM, can handle any number of layers, but it requires that pressure and rate data be recorded.; We verified these analysis methods by six test cases from the literature. These cases demonstrated the applicability and validity of the pre-production well test analysis methods.* ftn*Originally published in DAI Vol. 56, No. 10. Reprinted here with corrected bibliographic information.
机译：在这项工作中，我们满足了行业的需求，特别是在北海水库和环境脆弱地区，需要一种简单，廉价且对环境敏感的技术来表征和建模初始压力不相等的多层油藏。我们提出了在拉普拉斯空间中对于初始压力不相等的混合储层的一般解决方案。我们根据各个图层源/格林的功能得出了拉普拉斯空间解决方案。我们使用格林函数来处理由不相等初始压力的影响引起的不均匀初始边界条件。我们开发了一种快速的半分析模拟器MLSIM，用于模拟多层油藏的性能，包括试生产，具有相等初始压力的层的恒速降压和具有不相等初始压力的层的恒速降压。可从该模型获得的储层性能信息包括井筒压力，压力导数，各层流量和各层累计产量。事实证明，半分析模拟器比常规的三维有限差分商业模拟器要快。运行模型所需的信息量也大大减少了。我们设计了一种新的生产前测试井PPWT，用于分析初始压力不相等的混合油藏。试井测试仅需要顶层上方的压力表。与传统的多层测试技术相比，该测试大大降低了成本和时间。另外，由于没有地面生产，因此新的试井非常适合海上钻井或环境敏感地区的试井。我们开发了分析技术和方法来分析PPWT的性能。改进的Semilog方法MSM分析来自两层无限作用油藏的压力数据，以确定分数迁移率-厚度比。导数极限法DEM的优点是，可以从瞬态和后瞬态时间区域数据中确定各个层的属性，而不是属性的比率。集成的改进的导数极限方法，IMDEM，除了确定层的渗透率和表皮因子外，还确定了层的排水面积。速率归一化方法（RNM）可以处理任意数量的层，但是它要求记录压力和速率数据。我们通过文献中的六个测试案例验证了这些分析方法。这些案例证明了生产前试井分析方法的适用性和有效性。 ，第56号，第10期。在此转载了正确的书目信息。

著录项

  • 作者

    Ahmed, Ahmed Mohamed Aly.;

  • 作者单位

    Texas A&M University.;

  • 授予单位 Texas A&M University.;
  • 学科 Engineering Petroleum.
  • 学位 Ph.D.
  • 年度 1995
  • 页码 327 p.
  • 总页数 327
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 石油、天然气工业;
  • 关键词

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