5 results about "Horizontal wells" patented technology

A method and system for treating a portion of a hydrocarbon-bearing formation of a crude oil reservoir containing heavy hydrocarbons using a microwave enhanced heavy hydrocarbon recovery system includes forming a horizontal injection well having an injection horizontal run, forming a horizontal microwave source well having a microwave source horizontal run, forming a horizontal production well having a production horizontal run, introducing a treatment fluid into the crude oil reservoir through the horizontal injection well, introducing a microwave antenna having a microwave emitter into the horizontal microwave source well, introducing electrical power to the microwave emitter such, forming a microwave energy field which reduces the viscosity of the heavy hydrocarbons and forms a production fluid forms, and extracting the production fluid through the horizontal production well. The injection horizontal run is positioned below both the microwave source horizontal run and the production horizontal run.

This invention relates to the field of treating subterranean formations to increase production. The method of the current invention is particularly useful in hydrocarbon wells that are long, for example, in excess of one kilometer. The method providing increasing production from a primary wellbore by intersecting this wellbore with a secondary wellbore near to the hydrocarbon production zone such that acid treatment or other treatment can be directed to the intersection.

The invention discloses an intelligent sliding sleeve for multi-stage fracturing of a horizontal well and relates to, but not limited to, the technical field of fracturing sliding sleeves. The intelligent sliding sleeve comprises a detection unit, a control unit and an execution unit, wherein the detection unit is provided with an antenna module, the antenna module is used for detecting a load-carrying label for recognizing fracturing fluid and transmitting an obtained signal to the control unit; the control unit is provided with an electric control module, and the electric control module is used for generating a corresponding control signal according to the received signal and transmitting the control signal to the execution unit; the execution unit is provided with a motor module, a transmission module and a sliding sleeve module, and the motor module, the transmission module and the sliding sleeve module are connected in sequence; the transmission module is used for converting the rotational movement of the motor module into linear movement and driving the sliding sleeve module to act simultaneously; and the sliding sleeve module is used for achieving opening and closing of the sliding sleeve through linear movement. By the adoption of the intelligent sliding sleeve for multi-stage fracturing of the horizontal well, full-bore production of a pipe column can be achieved, free adjustment of the opening degree and closing degree of the sliding sleeve can be achieved, and the labor intensity of workers is effectively relieved.

The invention discloses a novel horizontal well terrestrial heat recharging method. The novel horizontal well terrestrial heat recharging method comprises the following steps that 1, selecting a terrestrial heat recharging research area with the proper temperature and flow; 2, establishing geothermal recharge numerical simulation models of two different well types by adopting numerical simulationsoftware; 3, performing comparative analysis, and proposing a proper recharging scheme; 4, implementing a recharge scheme, and comparing and analyzing data; and 5, according to data analysis, drawinga conclusion, in order to keep or improve the reservoir pressure and keep the high recharge rate and reservoir temperature, preferentially adopting a recharge scheme of different-layer horizontal wellrecharge vertical well mining with the well distance being 600 m and then adopting a vertical well different-layer one-recharge one-mining recharge scheme. The novel horizontal well terrestrial heatrecharging method is good in comprehensive utilization effect, pollution of terrestrial heat tail water to the environment is relieved, the reservoir pressure can be kept or increased, and the high recharging rate and the high reservoir temperature are kept.

The invention discloses a horizontal well construction method for promoting fracture dislocation and improving self-supporting capacity. The horizontal well construction method is suitable for an underground coal mine. The horizontal well construction method comprises the steps that reservoir parameters are detected, and rock mechanical parameters and ground stress parameters of a target mining interval of a reservoir are obtained; a vertical shaft is constructed, and the axial direction of the vertical shaft is perpendicular to the plane where the maximum and minimum horizontal principal stress directions are located; a steering horizontal well is constructed, and an included angle is formed between the axial direction of the steering horizontal well and the maximum horizontal principal stress direction; perforation and crack expansion are carried out in the horizontal well, alternate longitudinal double-wing cracks are generated through perforation, and after crack expansion, a crack face which passes through the axis of the horizontal well and is perpendicular to the plane where the maximum horizontal principal stress and the minimum horizontal principal stress are located is formed between the cracks; and fracture dislocation self-supporting is carried out, specifically, an artificial fracturing means is used for promoting dislocation slippage of the upper section and the lower section of the fracture, and a three-dimensional self-supporting fracture network is constructed.