The reporter learned from the Qinghai Oilfield Company of China National Petroleum Corporation on the 4th that the volume fracturing renovation of the Lion 49H1 well in the West of the West, known as the seismic exploration 'forbidden zone', was successfully completed. Thus far, Qinghai Oilfield has been implemented in the western part of the country. The volumetric fracturing process of horizontal wells has achieved high yield, and the effect of horizontal well + volume fracturing development mode has appeared.
The deep section of the Indo-West is a heroic ridge zone in the Qaidam Basin, where the average depth is about 4,600 meters. Due to the constraints of surface conditions, engineering techniques, and exploration knowledge, deep exploration in the Indo-West region has not seen great results in more than 30 years. , is the hardest oil and gas exploration in the Qaidam Basin.
According to Guo Ziyi, deputy director of the Institute of Drilling and Production Technology of Qinghai Oilfield, in order to turn reserves into real output, after more than two years of research and practice, Qinghai Oilfield has developed a set of horizontal wells suitable for the West of England. Transformation of the development model, research and development of the deep British and Western 'cassette multi-cluster + can be drilled bridge plug' and 'holeless packer + sliding sleeve fracturing' two main technical processes for industrial development.
“The so-called factory development is to use the ground multi-well platform in the same block to implement the same fracturing process transformation plan, and to organize the construction in the form of continuous factory line operations, reduce the development cost, and increase the construction efficiency and production efficiency. 'Guo Ziyi said that in June last year, the Qinghai Oilfield used the 'holeless packer + soluble ball + drillable ball slide sleeve' in the Shiping 1 well for the first time to achieve a volumetric fracturing test, which resulted in an average daily oil production of 25 tons. The development trials were successful; On February 23 this year, a large-scale volume fracturing operation was carried out on the Lion 49H1 well deployed in the Lion 49 well block in the main west of the Indo-West area. The high-yield oil was put into production, confirming again the horizontal wells in the west of the Indo area. + Correctness of volumetric fracturing development model.
Guo Ziyi said that obtaining high levels of horizontal wells will have a certain guiding significance for the efficient development of the Yingxi exploration area.
Qinghai Oilfield is the highest oil and gas field in the world. It is located in the Qaidam Basin in the northwestern part of Qinghai Province. It is an important oil production and supply base in Qinghai and Tibet, with an average elevation of about 3,000 meters. Up to more than 4 billion tons, natural gas resources nearly 100 billion cubic meters.
