METHOD AND DEVICE FOR DEVELOPMENT OF HEAVY OIL OR BITUMEN DEPOSIT USING TWO-HEAD HORIZONTAL WELLS Russian patent published in 2013 - IPC E21B43/24 

FIELD: oil and gas industry.

SUBSTANCE: method involves construction of upper injection and lower production two-head wells with horizontal sections located one above another, their being equipped with filters made in the form of a perforated casing string, heat carrier pumping through injection well with formation warming-up by creating the steam chamber and product extraction through production well with reduction of the extraction in temperature peak zones, which are monitored on thermograms taken from temperature sensors lowered to horizontal section of two-head production well. Based on the above thermograms, uniform warming-up of steam chamber is performed. Pipe strings are lowered from both heads inside the production well filter. Diameter of final section of one of the pipe string is larger than that of final section of the other pipe string to provide telescopic concentric arrangement in each other. During lowering process, the pipe string with final section of large diameter is equipped with a pump and on the outer side with a packer. Filter is divided into two product extraction zones by setting the packer. Control of the carrying capacity of each product extraction zone is performed depending on heat carrier and/or formation water breakthrough zone by means of restricted axial upward and downward movement from the head of pipe string with final section of smaller diameter and its fixation on the well head.

EFFECT: improving the method's efficiency and operating reliability of the device due to possible control of the product extraction during the operation.

2 cl, 4 dwg