Issue 22/2013 - Dawan gas field development technology passed the appraisal

Dawan gas field development technology passed the appraisal

Recently, Sinopec held an appraisal meeting
for key technology projects for the efficient development of horizontal wells in the Dawan high-sulfur gas field.
It is believed that the project is highly innovative, and the technical series developed for the horizontal wells of the relatively thin reservoir of the reef and beach has good field application effect, and the overall project has reached the international leading level, which has broad promotion prospects
.

Through independent innovation, the project has formed five key technologies for horizontal well development in high-sulfur gas fields, including multiple filter difference identification of reef and beach facies double media reservoir microfracture method, high sulfur dual medium gas-liquid and gas-liquid sulfur integrated seepage model, filling the domestic gap
.
The project team has formed a series
of technologies with independent intellectual property rights through the study of the geological structure, innovation and breakthrough development technology of the Dawan gas field.

Applying these technical achievements, the development plan of Dawan gas field has been further optimized: the number of drilling wells has been reduced from 25 to 13, and the output of a single well has increased from 360,000 cubic meters to 700,000 cubic meters.
The horizontal well drilling gas layer thickness compliance rate is 89.
3%, the high-quality gas layer drilling rate is 73.
0%, the drilling success rate is 100%, the perforation success rate is 100%, and the one-time perforation length is 1215.
5 meters world record; the success rate of the segmented transformation process is 100%, and the average unhindered flow rate of the gas well is 5.
656 million cubic meters / day; In China, the first horizontal well has been built to develop a high-sulfur gas field as a whole, with a production capacity of 3 billion cubic meters per year
.
The development and construction of gas fields have achieved safe production without accidents
.
In the past year since the Dawan gas field was put into operation, all development indicators have met or exceeded the requirements of the scheme design, and the economic benefits have been remarkable
.
Compared with the main body of Puguang, Dawan gas field has the characteristics of
thin reservoir thickness, low abundance and relatively poor reserve taste.

(Motor)