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Successful Cases of Horizontal-Well Tight-Sand-Gas Development in China

Three observations have resulted from horizontal-well development in the Sulige tight gas field. First, well-location selection should be influenced by detailed geological research. Second, measurement while drilling (MWD) is the most effective technique in enhancing the drilling success rate. Third, stimulation treatments such as multistage hydraulic fracturing are the most effective way for gas wells to increase their deliverability.

Introduction

Tight sand gas, one of the main types of unconventional gas reservoirs, displays the most rapid development worldwide in recent years, especially since its successful development in the US. Tight gas resources are estimated to be 10 trillion m3 in China alone. China holds a large amount of tight-sand gas resources and has obtained good performance in exploration and production during its 11th Five-Year Plan period. The Sulige gas field in the Ordos basin, the Xujiahe gas field in the Sichuan basin, and the Denglouku gas fields in the Songliao basin all show typically successful exploration and production of tight-sand gas in China. Compared with geological settings and development backgrounds in North America, tight-sand gas in China has differing characteristics, including poorer original gas in place, increased depth, and lower net-pay thickness.

This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper IPTC 16824, “Challenges of Horizontal Wells and Successful Cases for Tight-Sand-Gas Development in China,” by Jia Ailin, He Dongbo, Jia Chengye, Ji Guang, and Wei Yunsheng, PetroChina, prepared for the 2013 International Petroleum Technology Conference, Beijing, 26–28 March. The paper has not been peer reviewed. Copyright 2013 International Petroleum Technology Conference. Reproduced by permission.
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Successful Cases of Horizontal-Well Tight-Sand-Gas Development in China

01 November 2013

Volume: 65 | Issue: 11

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