Manufacturing method of metamorphic rock core
A production method and technology of metamorphic rock, applied in the field of oil and gas exploitation, can solve problems such as difficulty in obtaining natural cores and lack of cores, and achieve the effect of convenient operation and simple materials
Pending Publication Date: 2022-04-12
CHINA NATIONAL OFFSHORE OIL (CHINA) CO LTD +1
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Problems solved by technology
[0004] In view of the above problems, the purpose of this invention is to provide a metamorphic rock core production method based on reservoir cuttings. The method uses simple materials and is easy to operate. The real reservoir cuttings of metamorphic rock are used for core production. By establishing compaction pressure Correlation curves with core porosity and permeability to obtain target cores. The produced cores are close to natural metamorphic rock cores in terms of physical properties, pore structure, and cementation degree, which solves the problem of missing cores caused by difficulties in obtaining natural cores
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Embodiment 1
[0039] (1) Acquire the cuttings of metamorphic rock reservoirs flowed back during the drilling process of the Archaean buried hill layer in Block 19-6 of Bozhong, and deoil and dry the cuttings of metamorphic rock reservoirs. Petroleum ether for washing treatment, drying at 80°C for 8 hours;
[0040] (2) According to the mass ratio of metamorphic rock reservoir cuttings to ordinary Portland cement 6.0, and the mass ratio of ordinary Portland cement to water 1.5 (that is, every 100g of metamorphic rock reservoir cuttings needs to add ordinary Portland cement 16.7 g, water 11.1g), the three are put into a blender and mixed and stirred to obtain a semi-solidified homogeneous mixture;
[0041] (3) Smear one layer of butter on the surface of the rock core mold to prevent the rock core sample from sticking to the rock core mold during the preparation process, then slowly inject the homogeneous mixture in the step (2) into the rock core mold, and use a vibrating rod to vibrate the mo...
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The invention relates to a metamorphic rock core manufacturing method, which comprises the following steps: adjusting the adding proportion of reservoir rock debris, cement and water, and establishing a relation curve of compaction pressure, core porosity and permeability to obtain better compaction pressure so as to control the required target core porosity and permeability; the target rock core is obtained by establishing the relation curve of the compaction pressure, the rock core porosity and the permeability, the manufactured rock core is close to a natural metamorphic rock core in the aspects of physical property, pore structure, cementation degree and the like, the problems of rock core missing and the like caused by difficult acquisition of the natural rock core are solved, the used materials are simple, and the operation is simple and convenient.
Description
technical field [0001] The invention relates to the technical field of oil and gas exploitation, in particular to a method for making metamorphic rock cores based on reservoir cuttings. Background technique [0002] With the continuous deepening of oil and gas field development, the number of new drilling and measure wells is increasing every year. For any block, indoor physical simulation experiments are required to study the seepage mechanism. However, the number of natural cores obtained through drilling is limited, and natural cores are not available. recycled resources. Therefore, it is particularly important to find a substitute for natural rock core. [0003] At present, most of the core production methods are sandstone core production methods, and there are few reports on metamorphic rock core production methods. Artificial core production methods mainly include epoxy resin cementation method, phosphate (or silicate) high temperature sintering method, etc. Epoxy r...
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IPC IPC(8): G01N1/28
Inventor 谭先红范廷恩范洪军梁斌牛涛王帅肖大坤田波李南郭平胡义升田虓丰彭世强夏阳
Owner CHINA NATIONAL OFFSHORE OIL (CHINA) CO LTD