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In early July, the "13th Five-Year" National Science and Technology Major Special Project Liaohe and Xinjiang Heavy Oil/Super Heavy Oil Development Technology Demonstration Project led by Liaohe Oilfield passed the inspection and acceptance of the National Energy Administration
.
The expert group identified that the Liaohe and Xinjiang heavy oil/ultra-heavy oil development technologies had significant on-site demonstration effects and played a leading and demonstrative role in technology
According to reports, the establishment of the project is based on a substantial increase in the recovery rate of heavy oil reservoirs after huff and puff exploitation
.
The core is to form the technological innovation, integration and supporting of steam flooding, SAGD (Steam Assisted Gravity Drainage), and fire flooding, and to build the main technology demonstration project
According to the person in charge of the project team, the key technological innovations in the development of heavy oil/ultra-heavy oil in Liaohe Oilfield are mainly manifested in the following aspects: In terms of steam flooding, research on the mechanism of non-hydrocarbon gas assisted steam flooding has been carried out, and the formation of Class Ⅱ oil Reservoir steam flooding design technology broke the viscosity limit to 200,000 centipoise, which increased the oil-steam ratio of the well group; in terms of SAGD, it broke through the theoretical understanding of non-hydrocarbon gas-assisted SAGD technology, and the thickness limit of the continuous oil layer was reduced to 10 meters, which improved production In terms of fire flooding, we have understood the formation mechanism of oil-rich areas, improved the method of identifying the combustion state, established the technical boundary conditions for fire flooding, and built the largest fire flooding test base in China; in terms of gravity drainage assisted steam flooding, Original and independent technology, the successful field test of a 1,600-meter ultra-deep ultra-heavy oil reservoir has been achieved, and the recovery rate of the test area has reached 60%; in terms of supporting technology, it has formed a ring-shaped adjustable subdivision steam injection, stratified ignition, etc.
