Petrophysical Properties of an Iraqi Carbonate Reservoir Using Well Log Evaluation

Q4 Chemical Engineering Journal of Chemical and Petroleum Engineering Pub Date : 2020-03-30 DOI:10.31699/ijcpe.2020.1.8
Sarah S. Zughar, A. Ramadhan, A. K. Jaber
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引用次数: 4

Abstract

This research was aimed to determine the petrophysical properties (porosity, permeability and fluid saturation) of a reservoir. Petrophysical properties of the Shuiaba Formation at Y field are determined from the interpretation of open hole log data of six wells. Depending on these properties, it is possible to divide the Shuiaba Formation which has thickness of a proximately 180-195m, into three lithological units: A is upper unit (thickness about 8 to 15 m) involving of moderately dolomitized limestones; B is a middle unit (thickness about 52 to 56 m) which is composed of dolomitic limestone, and C is lower unit ( >110 m thick) which consists of shale-rich and dolomitic limestones. The results showed that the average formation water resistivity for the formation (Rw = 0.021), the average resistivity of the mud filtration (Rmf = 0.57), and the Archie parameters determined by the picket plot method, where m value equal to 1.94, n value equal to 2 and a value equal to 1. Porosity values and water saturation Sw were calculated along with the depth of the composition using IP V3.5 software. The interpretation of the computer process (CPI) showed that the better porous zone holds the highest amount of hydrocarbons in the second zone. From the flow zone indicator method, there are four rock types in the studied reservoir.
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利用测井评价伊拉克碳酸盐岩储层岩石物理性质
该研究旨在确定储层的岩石物理性质(孔隙度、渗透率和流体饱和度)。通过对Y油田6口井的裸眼测井资料的解释,确定了Y油田水坝组的岩石物理性质。根据这些性质,可将厚度约为180 ~ 195m的水坝组划分为3个岩性单元:a为上部单元(厚度约为8 ~ 15m),含中度白云化灰岩;B为中单元(厚度约52 ~ 56 m),主要由白云质灰岩组成;C为下单元(厚度>110 m),主要由富含页岩的白云质灰岩组成。结果表明:地层平均地层水电阻率(Rw = 0.021)、泥浆过滤平均电阻率(Rmf = 0.57),以及采用尖桩图法确定的阿奇参数(m = 1.94, n = 2, a = 1)。利用IP V3.5软件计算孔隙度值和含水饱和度Sw随储层深度的变化。计算机过程解释(CPI)表明,较好的多孔层在第二层中含烃量最高。从流带指示法来看,研究储层中存在4种岩石类型。
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CiteScore
1.20
自引率
0.00%
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0
审稿时长
8 weeks
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