随着油气田勘探开发向深层和新领域的不断扩展，深层成为建产重点，深井超深

With the continuous expansion of oil and gas field exploration and development into deep and new areas, deep formations have become the focus of production construction, and deep and ultra-deep wells have become the main form of well construction. Deep wells and complex wells facing drilling and completion projects continue to increase. The challenges faced by cementing technology are high, High pressure, gas channeling, leakage, and complex formation pressure systems have led to many problems such as poor cementing quality and annulus pressure, which puts forward higher requirements for high temperature and high pressure oil and gas well cementing. The use of high-temperature and high-density cement slurry system is used in the domestic and international markets for complex formation wells and shale gas wells and other unconventional oil and gas reservoirs cementing technical services, which effectively solves the problem of high-pressure oil and gas well cementing and becomes the key to high-temperature and high-pressure oil and gas well cementing One of the technologies. <br>Through the experimental analysis of the theory of solid phase particle packing of high-density cement slurry, Bohai Drilling established a close packing of three-stage particles, designed the particle size distribution of high-density cement slurry solid-phase materials, and optimized the domestically produced aggravation that matches the G-class cement. It has independently developed the BH-HTC high-temperature and high-density cement slurry system, which effectively solves the inability to adjust and uneven mixing among high-density cement slurry density rheology, sedimentation stability, and thickening sensitivity. World-class technical problems.

With the exploration and development of oil and gas fields to the deep and new areas of continuous expansion, deep become the focus of construction, deep wells ultra-deep wells become the main form of well construction, drilling wells are facing an increasing number of deep wells complex wells, solidification technology challenges of high temperature, high pressure, gas sprang, leakage and layer pressure system complex lead to poor solidity quality, ring air pressure and many other problems, high temperature and high pressure oil and gas wells solidification requirements. Using high temperature and high density cement slurry system, the technical service of complex formation wells and shale gas wells and other unconventional oil and gas reservoir cementing wells in domestic and international markets has effectively solved the problem of high-pressure oil and gas well cementing wells and become one of the key technologies of high-temperature and high-pressure oil and gas wells.<br>Bohai drilling through the experimental analysis of the theory of high-density cement slurry solid-phase particle accumulation, the establishment of three-stage particles of tight accumulation, design of high-density cement solid-phase material particle size distribution, preferably selected with G-grade cement matching domestic aggravatants, silicon powder and micro-silicon, independently developed BH-HTC high-density cement slurry system, effectively solve the high-density cement slurry density fluidization, deposit stability, thickening sensitivity can not be adjusted and mixed between the world-class technical problems.

With the continuous expansion of oil and gas exploration and development to the deep and new fields, deep wells become the focus of production construction, deep wells and ultra deep wells become the main form of well construction, drilling and completion projects are facing more and more complex deep wells, cementing technology is facing challenges, such as high temperature, high pressure, gas channeling, leakage and complex formation pressure system, resulting in poor cementing quality and annulus pressure Higher requirements are put forward for cementing of pressure oil and gas wells. High temperature and high density cement slurry system is used for cementing unconventional oil and gas reservoirs such as complex formation wells and shale gas wells in domestic and international markets, which effectively solves the cementing problems of high-pressure oil and gas wells, and becomes one of the key cementing technologies for high-temperature and high-pressure oil and gas wells.<br>Based on the experimental analysis of solid particle accumulation theory of high-density cement slurry, Bohai Drilling Company established three-level particle close packing, designed the particle size distribution of high-density cement slurry solid material, optimized domestic weighting agent, silica fume and micro silica matched with grade g cement, independently developed bh-htc high-temperature high-density cement slurry system, effectively solved the density rheology of high-density cement slurry It is a world-class technical problem that the properties, sedimentation stability and thickening sensitivity cannot be adjusted and mixed unevenly.<br>