Sandrock oil field all-rock mineral simulated rock core production method

Abstract

The invention relates to a manufacturing method of a sandstone oilfield whole rock mineral simulated core. The manufacturing method is as follows. Firstly, required mineral raw materials are weighted quantitatively according to the component content, the size composition and the physical parameters of the sandstone oilfield blocks, and the is evenly mixed and sieved. Then, prepared cementing agent and the well mixed mineral raw materials are proportionally prepared, and are fully well mixed and sieved. Under the conditions of 6MPa-22MPa manufacturing pressure and 5min-10min manufacturing time, the solid-liquid mixture after sieving is made into simulated core through a fixing die forming method. The simulated core is dried under the temperature-changing with time-fixing conditions. The drying temperature with consumed time is from 40 degrees Celsius with 8 hours, 80 degrees Celsius with 16 hours, 120 degrees Celsius with 8 hours, 160 degrees Celsius with 16 hours to 200 degrees Celsius with 8 hours. The method is simple, safe and easy to be operated. The manufactured simulated core is equipped with not only the pore throat characteristics and seepage properties of a natural core, but also the sensitive properties of the natural core.

Description

Technical field: [0001] The invention relates to a method for making rock cores in the fields of oilfield geology and chemistry, in particular to a method for making rock cores for sandstone oilfield whole-rock mineral simulations. Background technique: [0002] Daqing Oilfield is a multi-reservoir sandstone oilfield, and the geological conditions of the blocks are different. With the deepening of oilfield development, the number of injection wells and production wells has been increasing; the number of new drilling and measure wells has also been increasing. For any block, as long as there is fluid entering from drilling to taking measures, it is necessary to conduct a compatibility test between the fluid entering the well and the natural core, and the natural core is a non-renewable resource. At present, the natural core of some layers or even blocks is no longer available. ; In addition, in some extended blocks, no exploratory wells have been drilled, and natural cores ca...

AI Technical Summary

Problems solved by technology

For any block, as long as there is fluid entering from drilling to taking measures, it is necessary to conduct a compatibility test between the fluid entering the well and the natural core, and the natural core is a non-renewable resource. At present, the natural core of some layers or even blocks is no longer available. ; In addition, in some extended blocks, no exploratory wells have been drilled, and natural cores cannot be obtained at all

For the above reasons, many experiments related to the compatibility of technologies and reservoirs cannot be carried out, and the pertinence and effectiveness of the measures cannot be guaranteed.