Dynamic reconstruction method of time-shift logging curve
A technology of dynamic reconstruction and time-lapse logging, which is applied to seismology, measuring devices, and geophysical measurements for well logging records. It can solve problems such as poor correction effects and achieve the effect of improving accuracy
Active Publication Date: 2016-10-12
CHINA NAT OFFSHORE OIL CORP +1
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Problems solved by technology
In order to correct the error, in the past, the dynamic data of the logging curve was increased or decreased by a value based on experience; however, due to the strong heterogeneity of the reservoir and the large difference in physical properties, after entering the reservoir development stage, each The changing law of the dynamic data of the position is bound to be different, resulting in poor correction effect
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[0039] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0040] Such as figure 1As shown, a kind of dynamic reconstruction method of time-lapse logging curve of the present invention comprises the following steps:
[0041] 1) According to the time-lapse seismic data and logging data of the target work area, determine the basic data of the target work area, mainly including: the crude oil density of the target work area, the viscosity of crude oil in the target work area, the original oil saturation curve of the target work area before development, mud mass content curve, porosity curve, cross-sectional area of production wellbore, vertical thickness and measured thickness of production wellbore in the target layer, and production well dynamic information corresponding to the time point of seismic data collection in the target work area, including water saturation, annual Oil production, cumulative water ...
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The invention relates to a dynamic reconstruction method of a time-shift logging curve. The method comprises the following steps: determining basic data of a target work area; directly measuring pressure change of a production well shaft along the vertical thickness of a destination layer; determining a water penetration mode of a production well at a destination layer position; determining pressure change of a shaft position in a longitudinal direction; obtaining oil-containing saturation of a destination layer position at different time points by performing fluid replacement simulation on the production well at the destination layer position according to time; obtaining oil-containing saturation of a logging curve after reconstruction by screening the oil-containing saturation of the simulated destination layer position at the different time points; calibrating a rock physical model; calculating longitudinal wave speed, a transverse wave speed and density of the logging curve after dynamic reconstruction; obtaining synthetic seismic data through forwarding synthesis; comparing the synthetic seismic data with an actual well bypass, and if the dynamic reconstruction satisfying correlation requirements, ending the method; and otherwise, modifying a most influential parameter in the rock physical model, and returning to the previous step.
Description
technical field [0001] The invention relates to a processing method for oil and gas field exploration and development data, in particular to a dynamic reconstruction method for time-lapse logging curves. Background technique [0002] Petroleum logging refers to the use of special logging instruments to measure various parameters of the drilling section during the exploration and development stage of oil and gas fields, and to analyze and process these parameters for the analysis of formation characteristics and reservoir conditions, so as to determine various oil and gas layers and A science of well engineering parameters. Petroleum logging is the eyes of petroleum exploration and development. In different stages of oil and gas field exploration and development, the purpose and task of petroleum logging are also different. The main objects of development logging are the production wells completed in the open hole and the production wells with casing, which are used to analy...
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Login to View More IPC IPC(8): G01V1/40G01V1/30
CPCG01V1/306G01V1/40G01V2210/6169G01V2210/6244G01V2210/6246
Inventor 胡光义范廷恩范洪军王宗俊田楠高云峰张晶玉刘晨刘振坤张显文
Owner CHINA NAT OFFSHORE OIL CORP