US 2021/0010368 A1 · METHOD AND APPARATUS FOR DETERMINING OIL-GAS-WATER INTERFACE BASED ON FORMATION PRESSURE EQUIVALENT DENSITY

Abstract

The present invention provides a method and an apparatus for determining an oil-gas-water interface based on the formation pressure equivalent density. The method comprises determining working parameters of the wireline modular formation tester based on the acquired conventional logging data of a block to be studied; acquiring a series of formation pressure and corresponding depth data based on the working parameter; computing formation pressure equivalent densities at different depths based on the formation pressure and the corresponding depth data; drawing a crossplot of the formation pressure equivalent density and the depth according to the formation pressure equivalent density and the corresponding depth data at the different depths; and determining the oil-gas-water interface according to the position of breaking point of the formation pressure equivalent density on the crossplot of the formation pressure equivalent density and the depth.

Claims16

Dependent claims

A method for determining an oil-gas-water interface based on formation pressure equivalent density, wherein the method comprises the steps of:

acquiring conventional logging data of an oilfield well to be studied;
analyzing the conventional logging data and determining the working parameters of the wireline modular formation tester;
acquiring a series of formation pressure and corresponding depth data, wherein the formation pressure and the corresponding depth data are obtained by the wireline modular formation tester performing a test under the working parameters;
computing formation pressure equivalent densities at different depths according to the formation pressure and the corresponding depth data;
drawing a crossplot of the formation pressure equivalent density and the depth according to the formation pressure equivalent density and the corresponding depth data at the different depths;
and
determining the oil-gas-water interface according to the position of the breaking point of the formation pressure equivalent density on the crossplot of the formation pressure equivalent density and the depth.

4 more elements

A computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for implementing the following steps:

acquiring conventional logging data of an oilfield to be studied;
analyzing the conventional logging data and determining the working parameters of the wireline modular formation tester;
acquiring a series of formation pressure and corresponding depth data, wherein the formation pressure and the corresponding depth data are obtained by the wireline modular formation tester performing a test under the working parameter;
computing formation pressure equivalent densities at different depths according to the formation pressure and the corresponding depth data;
drawing a crossplot of the formation pressure equivalent density and the depth according to the formation pressure equivalent density and the corresponding depth data at the different depths;
and
determining the oil-gas-water interface according to the position of the breaking point of the formation pressure equivalent density on the crossplot of the formation pressure equivalent density and the depth.

4 more elements

Dependencies are inferred from the claim text.

Method and apparatus for determining oil-gas-water interface based on formation pressure equivalent density

Life of this patent

Method and apparatus for determining oil-gas-water interface based on formation pressure equivalent density

Life of this patent

Abstract

Claims16