APPLIED RESEARCH ON HYDRAULIC FRACTURING TECHNOLOGY WITH LOW SAND CONCENTRATION IN RESERVOIR A AND B OF SHAXIMIAO FORMATION, IN XINCHANG GASFIELD

Reservoir A and B of Shaximiao Formation in Xinchang gas field are the typical low permeability and compact sandstone reservoir. Usually, using the conventional fracturing technology lands in the waste of fracture conductivity in proppant compacted zone. Furthermore, the special situations, such as sand plug and extremely high pump pressure, often occur and result in failure of sand fracturing due to the compact and hard formation. In the paper, the feasibility of fracturing and method of optimized fracturing design with low sand concentration in Reservoir A and B in Xinchang gas field, are described in detail. The successful field tests in three wells show that fracturing technology with low sand concentration has overcome the problems caused by conventional fracturing technology, such as poor adaptability and sand plug, and has obtained good increase production and economic benefit. It is proved that the technology has a wide application prospects in the similar gas reservoir.