Billion-ton oil and gas field discovered in Henan
On July 4, according to Zhongyuan Oilfield news, the Ma 3001 inclined well deployed in the Dongpu Depression tested oil after fracturing and achieved a daily oil production of 62.8 cubic meters, a daily gas production of 43,200 cubic meters, and a high-yield industrial oil and gas flow, with an oil and gas equivalent of 106.0 cubic meters. It marks a major breakthrough in oil and gas exploration in the near-sag area of the old Dongpu area of the oil field, and is expected to form a 10-million-ton oil and gas reserves increase position.
It is understood that the Gegangji sag zone in the Dongpu Sag is a geological structure concept and deals with the junction of Shandong and Henan. The Zhongyuan Oilfield is located above the Dongpu Depression. In the past, due to difficulties in engineering and industrial technology, it was difficult to obtain large-scale exploration and development of some oil and gas resources here. Now, with the "acceleration" of scientific and technological research in the Zhongyuan Oilfield, there are more and more new breakthroughs in exploration and development of difficult-to-use reserves in the Dongpu Depression. The Ma 3001 inclined well deployed in the Gegangji depression is a new achievement in tapping the potential and increasing efficiency in the "old oil area".
In recent years, oilfield researchers have continuously strengthened the evaluation and target selection of self-sealing oil and gas reservoirs near the Dongpu Sag. They conducted in-depth research on the Gegangji Sag and found that there are high-quality hydrocarbons in the Sha3xia-Sha4 section of the sag. The source rock is well developed and has self-generation and self-storage structure-lithology and lithology oil and gas reservoir enrichment conditions. The oil resources are estimated to be 110 million tons, and it has great exploration potential.
During the drilling process, the well obtained good oil and gas indications, with a total of 87.63 meters of oil and poor oil layers encountered/29 layers, and the maximum thickness of a single layer was 11.76 meters. In order to further accurately evaluate the reservoir potential and increase production, scientific researchers have successively adopted the "cluster perforation + large displacement + multi-particle size strong support" volume fracturing technology, and the "concentrated perforation + sand addition + continuous sand addition" growth The fracture and lift diversion process is divided into five stages to carry out fracturing and reformation of the reservoir. The well started oil testing at the end of May this year, and has now completed four systems of testing and seeking production, achieving remarkable results.
The relevant person in charge of Zhongyuan Oilfield said that this breakthrough not only opened up a new position for increasing reserves and effectively promoted the large-scale exploration of "in-source high-pressure" oil and gas resources in the Dongpu Depression, but also had a positive impact on the subsequent exploration of oil and gas resources in the depressions in the same type of areas. reference and guiding significance.
