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发明公开
CN103321634A 一种利用液面法计算地层压力的方法 无效 - 驳回

一种利用液面法计算地层压力的方法
摘要：
本发明涉及石油勘探技术领域，具体而言，本发明涉及一种利用液面法计算地层压力的方法。通过采集测试井的油样得到井口压力与原油密度的函数关系；通过测量获得待测油井的井口压力、液面深度、油层中部深度和井口压力；根据所述井口压力与原油密度的函数关系，将原油密度表达为井口压力的第一函数，并将测量获得的井口压力带入所述第一函数得到随所述井口压力变化的原油密度；通过公式p＝ρ·g·(h1-h2)/1000+pc计算油层中部压力p，通过上述本发明实施例的方法，可以避免现有技术中将高精度压力计在井下进行压力测试，而通过井口的测量就可以得到满足试井分析的数据质量要求。
摘要（英）：

The invention relates to the technical field of oil exploitation, in particular to a method for calculating the stratum pressure by the aid of a liquid level process. The method includes acquiring oil samples of a test well to obtain a functional relation between the wellhead pressure and the crude oil density; acquiring the wellhead pressure of a to-be-tested oil well, the depth of a liquid level, the depth of the middle of an oil layer and the wellhead pressure of the oil layer by means of measurement; expressing the crude oil density by a first function of the wellhead pressure according to the functional relation between the wellhead pressure and the crude oil density, and substituting the measured wellhead pressure into the first function to obtain the crude oil density which changes along with the wellhead pressure; computing the pressure p of the middle of the oil layer by the aid of a formula p=rhoXgX(h<1>-h<2>)/1000+p. The method in an embodiment of the invention has the advantages that a high-precision pressure gauge which is used for down-hole pressure tests in the prior art can be omitted, and requirements of analysis of well tests on the quality of data can be met by means of measuring a wellhead.

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