Fast drilling agent formulation and preparation technique thereof

Abstract

The invention discloses rapid drilling agent which according to mass portion comprises 80-120 parts of vegetable protein, 160-240 parts of water, 24-36 parts of phosphoric acid with concentration of 30-50%, 40-60 parts of divinyl polyamine, 16-24 parts of sulfonating agent and pH modifying agent. The producing technique is that 1, 80-120 parts of vegetable protein are weighed and added into 160-240 parts of water. After resting under normal temperature for 100-1140 minutes, the mixture is stirred uniformly under a constant temperature from 45 DEG C to 55 DEG C. 2, the mixture is heated to 50-70 DEG C, and the pH of the solution is modified between seven and nine. 3, 24-36 parts of phosphoric acid with concentration of 30-50% are weighed and added into the solution which is then stirred to react for 80-100 minutes under constant temperature. 4, the temperature is lowered to 30-40 DEG C, 16-24 parts of sulfonating agent are weighed and added into the solution which is then stirred to react for 60-80 minutes under constant temperature. 5, the pH of the solution is modified between seven and nine. 6, 40-60 parts of divinyl polyamine are weighed and produce rapid drilling agent with the solution via polycondensation in 50-70 DEG C. The drilling agent can raise drilling speed to deep wells and ultra deep wells, thereby reducing exploratory development cost, decreasing development risk, protecting hydrocarbon reservoirs, and increasing recovery percent.

Description

technical field [0001] The invention relates to the technical field of drilling, in particular to a formula and a manufacturing process of a fast drilling agent (KSZJ). Background technique [0002] With the continuous expansion of the field of oil and gas exploration and development, the formations encountered in the drilling process are becoming more and more complex, the wells are getting deeper and deeper, the complex situation in the downhole is even more unpredictable, and the difficulty of handling is also increasing. When mud shale, soft shale, sticky shale and expansive shale are formed, such formations are easy to hydrate and expand, leading to complex downhole accidents, especially in deep well drilling in the west, when drilling encounters strong stress structures in piedmont and large The problem of wellbore instability in the shale well section is particularly prominent. At the same time, the drilled cuttings have strong adhesion properties, which greatly enhan...

AI Technical Summary

Problems solved by technology

[0002] With the continuous expansion of the field of oil and gas exploration and development, the formations encountered in the drilling process are becoming more and more complex, the wells are getting deeper and deeper, the complex situation in the downhole is even more unpredictable, and the difficulty of handling is also increasing. When mud shale, soft shale, sticky shale and expansive shale are formed, such formations are easy to hydrate and expand, leading to complex downhole accidents, especially in deep well drilling in the west, when drilling encounters strong stress structures in piedmont and large The problem of wellbore instability in the shale well section is particularly prominent. At the same time, the drilled cuttings have strong adhesion properties, which greatly enhances the adhesion between the drill cuttings and the surface of the drill bit in contact, causing the drill bit to The mudball increases the torque, and at the same time, the end face of the drill bit in the mudbag bears part of the WOB, which limits the cutting depth of the drill bit, thereby reducing the drilling speed; at present, the slow drilling speed of large-scale well sections, deep well sections and high-density drilling fluids has become One of the main technical bottlenecks affecting the speed of exploration and development