At noon on August 28, 2008, the underground special operations department of Zhongyuan Oilfield applied the crack forced closing technology to perform fracturing on the well No. 1-12. The construction of a total injection of 251.3 cubic meters of fracturing fluid, the average sand ratio of 24.7%, the rupture pressure of 48.6 MPa, the construction pump pressure of 48.8 MPa, the general displacement of 4.6 cubic meters / minute, the entire construction at one go.
Department 1-12 was a development well drilled in 2002. It has produced 130 million cubic meters of natural gas. In order to further refine the development, the natural gas production and sales plant decided to implement fracturing and reconstruction on the Sha-4 and 2 well sections to improve its infiltration conditions and explore natural gas production capacity in small and thin gas beds.
The downhole special operations department of the contract design and construction aimed at the formation conditions of the well, considering that the well inclination was 54.3 degrees, designed a small ceramic grain sand slug and the best sand ratio technology to effectively eliminate near-wellbore bending resistance and ensure the most Good cracks. The 11 layers of this joint fracturing, the maximum thickness of the gas layer is only 2 meters, the minimum thickness is only 0.8 meters, construction difficulties, high technical requirements. In order to ensure the efficiency of fracturing measures, the forced closure technology of cracks is applied in the construction of Zhongyuan Mine to minimize the occurrence of microcracks. During the construction, the fracturing engineering department of the site did a good job of maintaining the equipment in advance, replacing new pump heads, high-pressure parts, and other components to ensure the safe operation of the fracturing equipment. The fracturing team officers who fought in the war braved the high temperatures on the spot. After an hour of meticulous construction, the fracturing work was successfully completed.
Department 1-12 was a development well drilled in 2002. It has produced 130 million cubic meters of natural gas. In order to further refine the development, the natural gas production and sales plant decided to implement fracturing and reconstruction on the Sha-4 and 2 well sections to improve its infiltration conditions and explore natural gas production capacity in small and thin gas beds.
The downhole special operations department of the contract design and construction aimed at the formation conditions of the well, considering that the well inclination was 54.3 degrees, designed a small ceramic grain sand slug and the best sand ratio technology to effectively eliminate near-wellbore bending resistance and ensure the most Good cracks. The 11 layers of this joint fracturing, the maximum thickness of the gas layer is only 2 meters, the minimum thickness is only 0.8 meters, construction difficulties, high technical requirements. In order to ensure the efficiency of fracturing measures, the forced closure technology of cracks is applied in the construction of Zhongyuan Mine to minimize the occurrence of microcracks. During the construction, the fracturing engineering department of the site did a good job of maintaining the equipment in advance, replacing new pump heads, high-pressure parts, and other components to ensure the safe operation of the fracturing equipment. The fracturing team officers who fought in the war braved the high temperatures on the spot. After an hour of meticulous construction, the fracturing work was successfully completed.
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