Research And Application Of Excellent Drilling Technology In Gaomiao Block In Western Sichuan

It is rich in natural gas resources in Gaomiao region, Has a great potential for development. But block play is rich in sandy gravel, Construction process leaves dance drill is serious, Reservoir has a long period of development of mud shale, easy to collapse, sticking, such as complicated conditions, and the surrounding block the development for many years, formation pressure is uncertain, borehole trajectory control is difficult, difficult construction, high security risks and drilling process of drilling in the region in the acceleration effect.Focus on the rock mechanics features, formation pore pressure, ground stress characteristics, formation collapse and fracture pressure characteristic research. On the basis of a large number of indoor experiments, Dominated by well logging method, combining with the field actual data validation, Set up a series of engineering geologic parameter profile Gaomiao region areas, Understand the characteristics of borehole wall stability, the system analyzes the sidewall instability of main controlling factors. Provide the basis for drilling engineering application; And carry out the countermeasures of drilling engineering and application research.Study sidewall instability is a mechanical main controlling factors, optimization is put forward a set of suitable polyamine calcium base drilling fluid system, targeted well bore structure optimization measures are put forward, and the reasonable formulation principles of safe drilling fluid density, recommend the suitable for Gaomiao region bit type and drilling parameters; And use the regional engineering geological characteristics of the study, can effectively guide the engineering application. Through field application, the overall achievements application effect is good, effectively improve the drilling efficiency. And to establish and optimize the subsequent process of exploration and development provides the foundation to support and technical reserves. To promote the mass work of exploration and development block has important practical significance.To improve the efficiency of drilling, drilling engineering cost effective control level, through Gaomiao region engineering geology basic theory research, the formation of form a complete set of optimized drilling technology countermeasures, discuss using efficient screw, turbine drilling, hydraulic oscillator, such as the possibility of advanced technology, follow the construction application form a complete set of optimized drilling technology in well, speed up effect has got good validation; And then to accelerate the Gaomiao region play a certain guiding significance to the exploration and development process.