(1) 51 / 2 "casing Horizontal Well lifting of the electric submersible Piston Pump Technology
For 51 / 2 "casing radius of curvature in the horizontal wells have not sucker rod pump wells down to the level of, and can not be overcome-and the eccentric wear problems. Studied Horizontal Well lifting of the no-rod technology, is the principle of linear motors and the level of pump and tubing connected to the horizontal well, the motor stator and tubing connected, moving in the sub-control system under the control of reciprocating movement along the axis, the level of pump driven reciprocating plunger movement to achieve pumping lift. major Research on the small-diameter flexible small-diameter permanent magnet linear motors, variable frequency control system, the level of pump, cable protection technology and low permeability oil into the dynamics of horizontal wells and on-site verification. by ground test: motor 200 Kg of deformation of the largest role 6cm, converted elastic deformation 17.18 ° / 25m. submersible electric piston pump will be placed in the unit level within the tank, pump outlet pressure-22 MPa, liquid production capacity of 145 Kg / time, the pump efficiency was 98.4%. field test three wells, were down to the horizontal toe, central, and with the end produced an average of 9.1 t, the average pump efficiency 95%, average 20.3% system efficiency. tune the parameters to reduce the flowing pressure, increase the amounts of liquid when flowing pressure to 1.5 MPa about lowering the volume of liquid production, the IPR curve inversion. obtained through tests: horizontal electric submersible Piston Pump technology can be down to 51 / 2 "casing radius horizontal well in any position to achieve ju l, pump efficiency, system efficiency, and there is no rod, the partial mill to avoid the system at the pump operations. But also down to the horizontal, reducing the flow pressure, the greater level of play to a new level of capacity, increased liquid production of single well.
(2) Horizontal thin interbedded reservoir fracturing and completion optimization and practice
To increase the thickness of about 1 m, sandstones and mudstones deposited interactive low permeability reservoirs using horizontal wells reserves, design wear multiple layers of drilling wells trajectory ladder against oil thin, and the level of development of poor hole perforated completion control the development of low reserves difficulty in fracturing and completion optimization study, it is first of borehole drilling has been around track and drilling vertical wells, predict reservoir porosity and permeability model and reserves distribution of choice around the hole at the end of the site used as a reservoir fracturing layer para 2 is based on the distribution of water injection wells around connectivity and the determination of the single-transformation of scale and form cracks, optimization and field test 10 wells, the average Well, the oil-producing t, and not optimized fracturing wells compared to the same district, Well t average yield. Drawn from the test results: horizontal wells if control of the oil-bearing layer of high, the fracturing can be higher productivity; low permeability thin alternating layers of horizontal well fracturing through optimization of drilling can be no communication between the reservoir case, the degree of increase reserves used . Optimization of the fracturing effect of increased development and economic benefits.
