Effect of Horizontal Well Model Transformation in the First High and Steep Formation in Qinghai Oilfield is Satisfactory

2022-01-12 Viewed:420

Source:CNPC News

Well Niu 16, the first horizontal well in high and steep formation in Qinghai Oilfield, has achieved satisfactory results after the transformation of the mode of "horizontal well + volume fracturing". As of January 4, the well has been stable for more than 20 days. Technological progress has provided strong support for Qinghai Oilfield to explore the distribution and benefit production of Niudong Jurassic oil and gas reservoir.

Improve the safe drilling and completion technology of long horizontal wells, strengthen the "technical scheme demonstration, supporting process research and key link control", and form four supporting technologies for horizontal well drilling and completion, such as optimizing the well structure. Five wells are applied on site, the length of horizontal section is 1100 meters longer than that in the 13th five year plan, and the drilling cycle is shortened by 37%.

Improve the unconventional reservoir fracturing technology, adopt the integrated research method for complex geological engineering conditions, establish a five party discussion system, implement the volume transformation idea of "dense cutting + limit flow + large displacement", and realize "three decreases and three improvements". Among them, the oil pressure fracturing of Ganchaigou shale has made a major breakthrough, with a daily oil output of 81.98 cubic meters and a daily gas output of 126.87 million cubic meters.

To promote the research of gas injection matching technology, the first phase of the major development test of gas-E31 reservoir oxygen reduction air drive has achieved continuous and steady gas injection, and 4 gas injection matching technologies, such as the research of temperature and salt resistance foam anti channeling system, have been formed. The oxygen content of the injection gas increases from 2% to 8%, and the total gas injection is 19 million cubic meters.


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Author:    News Time:2022-01-12

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