North China Oil Field "Coal Sea Gold" to Consolidate the "Bottom"
The North China Oilfield has increased its efforts to stabilize the production of coalbed methane, and made every effort to increase reserves and increase production by "doing stable production in the old area, making deep breakthroughs, and making fine peripheral replacements", so as to consolidate the "home base" for natural gas supply. As of May 17, the CBM supply guarantee capacity of Huabei Oilfield has increased by 200 million cubic meters, and breakthroughs have been made in several test well evaluation Wells. Since the beginning of this year, the North China oilfield has steadily supplied 1 billion cubic meters of gas, more than the same period last year.
Strengthen exploration and evaluation to enrich resources. Technical personnel in Huabei Oilfield strengthened the interpretation of fine structure, deepened the re-understanding of reservoir, and reconstructed the evaluation of complex fold belt, and the success rate and gas volume of single well gas test were greatly improved, and the scale reserves were increased. We accelerated the deep breakthrough project, identified the deep favorable coal seams and zones, strengthened the tracking analysis of drilling, and further implemented the scale of coal bed methane resources in deep and peripheral blocks.
Adhere to the integration of promotion, production efficiency increases. Since the beginning of this year, in response to the problem that technological progress is not compatible with the efficient production of coalbed methane, the relevant departments and units of North China Oilfield have continued to optimize the top-level design of the development plan, upgrade the technology of fine structure interpretation and coal reservoir structure description, large-scale volume transformation technology, formulate well location plans in different regions, and the development well quality rate has reached 95%. The average daily gas output of new horizontal Wells is more than 8,000 cubic meters, the capacity to capacity rate reaches 100%, and the internal rate of return reaches the scheme design index. At the same time, innovative organization and operation, strengthen technical support, formulate four drilling speed measures such as "one-trip drilling of the reservoir, integration of recording and guiding", and make every effort to improve the quality and speed of drilling, fracturing, and production, and significantly shorten the drilling cycle of development Wells. We deepened the treatment of low-efficiency Wells in old areas, optimized and upgraded the secondary transformation technology of "filling pre-plugging + large displacement + self-suspension", and implemented 20 Wells with daily gas increase of more than 500 cubic meters per well.
In the fine gas field development of Huabei Oilfield, the "six curves" of overall gas and water volume, new well gas and water volume, and old well gas and water volume are taken as the starting point, and three guarantee mechanisms of "regular meeting notification, abnormal emergency rescue, and closed-loop management" are formulated. The operation time of horizontal Wells is significantly reduced, and the fluctuation of daily gas volume is reduced.
