In recent years, China has discovered and developed a series of deep or ultra-deep carbonate reservoirs. These reservoirs are characterized by their depth, high formation temperature,substantial reservoir thickness, severe heterogeneity, high carbonate purity in the matrix, and low natural production rates. Acidizing is a crucial production enhancement method for such reservoirs, and the performance of acidizing fluids directly affects the acidizing results. Therefore, these reservoirs demand higher requirements for acidizing fluid systems.

Compared to traditional fracturing and acidizing techniques, the Temporary Plugging Diversion Stimulation Technology (TPDST) enables refracturing and acidizing in aging wells, achieving flow diversion and increasing the Stimulated Reservoir Volume (SRV) in coalbed methane (CBM) and shale reservoirs. The Composite Temporary Plugging Technology offers comprehensive refracturing solutions and services for all well conditions.

Our company produces a slickwater working fluid system with a total of 7 patented inventions to cater to various types of working fluids (slickwater, variable-viscosity slickwater, linear gel,crosslinked fracturing fluids) and different geological conditions such as sandstone, shale, and coalbed methane. It can also adapt to various water qualities, including fresh water, saline water, and flowback fluid, offering precise product matching and optimized working fluid performance.

To achieve uniform and refined stimulation, conventional carbonate reservoirs can also design tailored temporary plugging schemes based on different completion methods. For instance, in casing completion, using temporary plugging knots can effectively and precisely seal the perforations in long perforation sections, achieve interlayer and intralayer temporary plugging and diversion, and partially substitute mechanical layering. In open-hole completion, a composite temporary plugging scheme can be used to achieve temporary plugging within the fracture, thereby attaining refined and uniform stimulation.

Hydraulic fracturing is an indispensable technology for developing shale oil and gas resources.Slickwater fracturing fluid systems, with an anionic polyacrylamide thickener, are used in over 85% of cases. However, the introduction of slickwater as an external fluid into the formation inevitably leads to reservoir damage. The polymers in slickwater adhere to shale rock through weak chemical bonds, substantially affecting the effectiveness of shale reservoir enhancement.Disrupting the interaction between polymers and shale is crucial to reducing polymer retention in the reservoir and enhancing reservoir modification.

Enhancing production in heterogeneous carbonate rock reservoirs with severe heterogeneity and well-developed natural fractures is a highly challenging operation. These challenges stem from the need to meet the acid formulation requirements for deep-buried, high-temperature carbonate rock reservoirs, the associated drilling techniques, and well-completion requirements that satisfy isolation and acidizing demands. The Heterogeneous Carbonate Rock Diverting Acidizing Technology can meet these operational requirements, and our company has developed mature diverting acidizing product formulations, with over 100 successful operations to date.

As one of our mature product lines, our dissolvable bridge plugs are backed by a total of 19 utility and invention patents. These plugs come in a comprehensive range of models, suitable for various casing dimensions and formation temperatures. Both the pressure resistance and dissolution time of these products can be customized to suit the specific geological conditions in different regions, ensuring optimal performance.

The low-friction acid used for deep oil and gas wells acidizing is independently developed by our company. It has secured three invention and utility model patents. It comprises two additives: low-friction acid thickening agent WLD11 and acid composite enhancer WLD12. The low-friction acid thickening agent is synthesized through cationic polymer modification, while the acid composite enhancer is composed of organic compounds like surfactants.

The novel anti-sedimentation fibres developed by our company utilize graphene nanomaterial technology to enhance the interaction of interfacial charges, enabling fibres and proppants to form a uniform and stable three-dimensional network structure in slickwater; overcome the gravity settling of proppants, improve the long-term structural stability performance of fibres and proppants, and form a stable structure that maintains a high height in the fracture for a long time.

Bridge Plug-Free Segment Fracturing in Cased-Hole Wells：Achieve bridge plug-free segment fracturing by sealing already modified perforations and using small-sized perforation guns；Utilize the priority sealing function for high-permeability perforations and in-fracture sealing using temporary plugging agents to enable mid-fracturing reorientation and improve fracturing uniformity.

The conventional open-hole fracturing process is currently the most widely applied and matured production enhancement technology. Our company offers customized services for various types of open-hole wellbore segmental tools, with the company holding six invention and utility model patents for this system.

In China, carbonate rock oil and gas reservoirs are widely distributed and hold significant exploration and development potential. However, due to the complex geological conditions and strong heterogeneity of carbonate rock reservoirs, these reservoirs are characterized by poor physical properties, extreme depth, high temperature, high pressure, and typically require wellbore casings with steel grades of 140 and above. Our company employs wellbore packers as part of the segmentation process, with a design for permanent packers that meets V0 standards and incorporates high-temperature, high-pressure, and high-strength anchoring mechanisms, effectively addressing the operation requirements of carbonate rock oil and gas reservoirs.

Post-fracturing monitoring is a vital tool for fracturing effect evaluation and fracturing design optimization. Our company has developed a quantum dot tracing monitoring technology that can assess the fracturing effect after fracturing. Currently, the patent for this product has been granted: A quantum tracing device and completion pipe for oil and gas wells. Quantum dots are artificially synthesized semiconductor fluorescent nanocrystals that have excellent photoluminescence, water solubility, low cost, high detection accuracy, wide sources and other benefits. They have been applied in the field with remarkable results and have promising application prospects in shale horizontal wells.