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Fractal recognition method for cross-well sand body connectivity on basis of injection and production quantity relation

An identification method and connectivity technology, applied in the fields of fluid extraction, measurement, and 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: 2018-06-29
ZHEJIANG OCEAN UNIV
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Problems solved by technology

[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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  • Fractal recognition method for cross-well sand body connectivity on basis of injection and production quantity relation
  • Fractal recognition method for cross-well sand body connectivity on basis of injection and production quantity relation
  • Fractal recognition method for cross-well sand body connectivity on basis of injection and production quantity relation

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Embodiment Construction

[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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Abstract

The invention relates to the technical field of oil-gas field development and discloses a fractal recognition method for the cross-well sand body connectivity on the basis of the injection and production quantity relation. The injection and production quantities of a complex non-linear multi-phase-flow system composed of water injection wells, oil production wells and reservoirs between oil-waterwells are subjected to data recording. By obtaining the fractal dimension of the set of multi-variation injection and production quantity recorded data of the system, implied information of the connectivity of the reservoirs between the oil-water wells can be extracted, the method does not need complex mathematic models and geological static state model parameters, qualitative-quantitative explaining recognition can be achieved, and a new thought is developed for recognition of the connectivity of the inter-well reservoirs. The fractal recognition method has the beneficial effects that the cost is low, production dynamic data are utilized on the basis of the fractal theory, the complex mathematic models and geological static state model parameters are not needed, the theory is clear, the algorithm is simple, and qualitative-quantitative explaining recognition can be achieved.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/00E21B43/20G06Q50/02
CPCE21B43/20E21B47/00G06Q50/02
Inventor 王任一
Owner ZHEJIANG OCEAN UNIV
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