A fracturing and filling sand control performance testing system and its testing method and evaluation method

Abstract

The invention discloses a fracturing filling sand control performance testing system and a testing method and an evaluation method thereof, which can optimize the fracturing sand control construction parameters and improve the fracturing sand control effect. The system of the present invention includes a parallel-connected fracturing-packing belt single-wing fracture sand-retaining visualization simulation main device and a fracturing-filling belt double-wing fracture sand-retaining dual-linear flow visualization simulation main device, which can realize sand-proof fracture filling for fracturing filling Different experimental tests and evaluation purposes with flow and sand retention. The whole system has comprehensive functions and reasonable process, which can realize automatic sand addition, automatic sand collection, automatic data collection, etc. The data monitored by the experimental system is comprehensive, providing comprehensive test data support for the comprehensive sand control performance evaluation of the fracture filling zone. The performance index evaluation method provided by the invention measures the diversion performance, sand-retaining performance and comprehensive performance of the filling layer for fracturing and sand prevention, and the evaluation is scientific and reasonable.

Description

technical field [0001] The invention relates to the technical field of oil and natural gas development and exploitation, in particular to a fracturing filling sand control performance testing system and a testing method and evaluation method thereof. Background technique [0002] At present, more than 70% of conventional oil and gas fields in the world are weakly cemented unconsolidated sandstone reservoirs. Such reservoirs have the characteristics of high permeability and poor cementation. Sand production in oil wells is one of the engineering problems often encountered in the production process. Fracturing packing sand control is a mainstream sand control technology, which combines hydraulic fracturing and gravel packing, and fills the fractures opened by hydraulic fracturing with gravel or ceramsite to achieve the dual purposes of sand control and production stimulation. Fracturing packing sand control mainly relies on the packing zone in the fracture to hold back formati...

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Problems solved by technology

[0003] (1) The existing testing device used to evaluate the sand control characteristics of the filling medium in the fracture filling zone is relatively simple, and mainly evaluates the sand-retaining characteristics of the filling medium itself, and cannot simulate the sand-retaining and flow characteristics of fractures in the formation environment

Filling medium performance evaluation test system under the condition of lack of real fractures

[0004] (2) For the comprehensive performance evaluation of fracturing and sand control fracture filling media, the evaluation factor considered is mainly the flow conductivity, and there is a lack of evaluation of sand retaining effect and comprehensive effect, and a systematic quantitative evaluation method

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