Fractal Identification Method of Interwell Sandbody Connectivity Based on Injection-production Relationship
An identification method and connectivity technology, applied in the fields of fluid extraction, measurement, earthwork drilling, etc., can solve the problems of high cost, long research and analysis time, etc., and achieve the effect of simple algorithm, clear theory and low cost
Active Publication Date: 2021-06-18
ZHEJIANG OCEAN UNIV
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[0003] The present invention needs to establish a complicated mathematical interpretation model in order to solve the identification method of interwell reservoir connectivity and water flow direction in the prior art, the research and analysis time is long, the cost is high, and it also needs to rely on other geological models studied Insufficient, it provides a low-cost, based on fractal theory using production dynamic data, does not require complex mathematical models and geological static model parameters, clear theory, simple algorithm, can realize from qualitative to quantitative interpretation and identification based on the relationship between injection and production Fractal Identification Method of Interwell Sand Body Connectivity
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[0032] The technical solutions of the present invention will be further specifically described below through the embodiments and in conjunction with the accompanying drawings.
[0033] As shown in the attached figure, the fractal identification method of sand body connectivity between wells based on the relationship between injection and production volume, where:
[0034] The HD1 block of an oilfield in the west is located in the WJS structural belt, the structure is a faulted anticline cut by the MH fault, and the reservoir is a set of fan delta front sedimentary bodies. The average porosity is 16%, the permeability is 33.4×10-3μm2, and the main production layer is single (s23).
[0035] Using this method, two oil production wells (HD1-11 and HD1-121 wells) and two water injection wells (HD1-10 and HD1-12) near the southern MH fault high that are still producing in this layer (s23) are connected to the reservoir analysis, see figure 2 The elliptical area marked by the dott...
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The invention relates to the technical field of oil and gas field development, and discloses a fractal identification method for interwell sand body connectivity based on the relationship between injection and production volumes, which is used for complex nonlinear multiphase reservoirs composed of water injection wells, oil production wells, and oil-water well interwell reservoirs. By calculating the fractal dimension of the multi-variable injection-production record data of the flow system, the hidden inter-well reservoir connectivity information of oil-water wells can be extracted. This method It does not require complex mathematical models and geological static model parameters, and can realize identification from qualitative to quantitative interpretation, which opens up a new idea for the identification of interwell reservoir connectivity. It has low cost, uses production dynamic data based on fractal theory, and does not require complicated The mathematical model and geological static model parameters, clear theory, simple algorithm, can achieve beneficial effects from qualitative to quantitative interpretation and identification.
Description
technical field [0001] The invention relates to the technical field of oil and gas field development, in particular to a fractal identification method for sand body connectivity between wells based on the relationship between injection and production volume. Background technique [0002] When the oilfield development enters the high water cut period, study the connectivity of interwell reservoirs and the direction of water flow of oil production wells, predict the remaining oil between wells, adjust well pattern layers, deploy newly drilled adjustment wells, and put into production perforations The formulation of the program plays an important guiding role in decision-making. At present, there are three main types of identification methods for interwell reservoir connectivity and water flow direction: ① Numerical simulation methods. The factors considered are more comprehensive, and the results obtained are more intuitive. However, due to the consideration of many factors,...
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IPC IPC(8): E21B47/00E21B43/20G06Q50/02
CPCE21B43/20E21B47/00G06Q50/02
Inventor 王任一
Owner ZHEJIANG OCEAN UNIV