A fluid identification method for clastic rock reservoirs based on array induction logging
An array sensing and fluid identification technology, applied in earth-moving drilling, wellbore/well components, etc., can solve problems such as the inability of the reservoir to correctly reflect the fluid properties of the reservoir, the leakage of oil and gas layers, and the decline in the reliability of logging interpretation.
Active Publication Date: 2017-09-26
BC P INC CHINA NAT PETROLEUM CORP +1
View PDF8 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] When the reservoir type is complex, the lithology and fluid properties simultaneously affect the electrical properties of the reservoir, and the absolute value of the resistivity of the reservoir cannot correctly reflect the fluid properties of the reservoir; especially when there are low-resistivity oil and gas layers in the area, relying on In this case, the calculated oil saturation of the reservoir is seriously distorted, and the phenomenon of oil and gas layer leakage is common, which seriously reduces the credibility of logging interpretation.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0038] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0039] The clastic rock reservoir fluid identification method based on array induction logging provided by the present invention realizes that, without considering the absolute value of reservoir resistivity, through the existing array induction logging data, it can be reflected that the mud contains different The intrusion of the fluid in the radial direction of the reservoir leads to different characteristics of the resistivity change, so as to quickly, accurately, continuously and reliably judge the properties of the reservoir fluid (the resistivity of the mud is required to be greater than or equal to twice the resistivity of the formation water).
[0040] The clastic rock reservoir fluid identification method based on array induction logging provided by the pr...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a fluid identification method for clastic rock reservoirs based on array induction logging. First, the reservoirs that have been tested for oil in the block are used to read the resistivity value of the layer array induction logging, and then the array induction slope characteristics are calculated. Parameters and related characteristic parameters, according to the conclusion of oil testing, the intersection diagram of array induction slope characteristic parameters and related characteristic parameters is established in series to determine the boundary area of oil, gas and water; finally, the fluid in the target layer of a new well is accurately judged. The invention realizes the method of determining the property of the reservoir fluid based on the array induction logging data without considering the magnitude of the absolute value of the resistivity, and can accurately and reliably identify the reservoir fluid.
Description
technical field [0001] The invention belongs to the technical field of fluid property logging evaluation of complex oil and gas reservoirs in petroleum exploration, and relates to a method for quickly discriminating fluid properties for low-resistivity oil and gas layers, in particular to a clastic rock reservoir based on array induction logging Fluid identification method. Background technique [0002] The properties of the fluid contained in the reservoir are one of the main contents of logging interpretation and evaluation. Usually, the identification of the reservoir fluid mainly depends on the electrical properties of the reservoir. When the relationship is good, the fluid contained in the reservoir can be accurately judged by using the resistivity value of the reservoir, namely: [0003] [0004] Where: R t is the resistivity of the reservoir, R 1 is the lower limit value of regional oil layer resistivity, R 2 is the upper limit value of regional water layer res...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): E21B49/08
Inventor 赵建斌万金彬罗安银程道解刘宁静白松涛杨玲黄娅李慧莹
Owner BC P INC CHINA NAT PETROLEUM CORP