The purpose of reservoir protection is to ensure that the seepage resistance of reservoir fluid will not increase during the implementation of various engineering and technical measures for oil, gas and water wells. The development effect of potassium formate drilling fluid in oilfield is embodied in various engineering and technical measures adopted in oilfield development, such as drilling, completion, oil recovery, water injection, workover operation and stimulation measures. Does potassium formate drilling fluid protect oil layer? The manufacturer tells you.

During the whole process of development, the quality of systematic reservoir protection is related to the optimization of well-entry fluids and implementation technology of potassium formate drilling fluids according to Oilfield Geology and reservoir engineering design, so as to reduce the degree of formation damage, give full play to the reservoir potential, reduce the amount of operation to relieve reservoir damage and improve the benefit of oilfield development.

Reservoir damage

In the process of drilling, cementing, perforation, oil testing, acidification, fracturing, oil recovery, water injection and workover, the original equilibrium state of oil and gas reservoirs will be destroyed in varying degrees. The phenomenon of permeability decline near wellbore caused by incompatibility of the well-entry fluid with the reservoir and its fluids is called reservoir damage. The causes and factors that may cause formation damage during oil and gas well operation are listed.

In the process of oil and gas field development, there are many reasons that may cause reservoir damage. The main damage mechanism can be summarized as the following four aspects:

(1) Damage caused by incompatibility of foreign fluids with reservoir rocks and minerals;

(2) Damage caused by incompatibility of foreign fluids with reservoir fluids;

(3) Injury caused by capillary phenomenon;

(4) Injury caused by blockage of solid particles.

During the whole process of development, all reservoir protection measures are based on the analysis of reservoir lithology, core analysis, sensitivity test of well-entry fluids, and the analysis of the main factors that may cause formation damage. The key is to optimize the well-entry medium and operation technology, and to put forward suitable, effective, operable and economic measures. Economically feasible reservoir protection requirements and measures.

Potassium formate drilling fluid is a new additive. Potassium formate drilling fluid has a strong ability to inhibit clay hydration, dispersion and expansion, and to control the low content of slag. The returned drilling cuttings are small round grains, and the interior is dry. Potassium formate drilling fluid does not paste shaker and run propeller. It has the characteristics of good inhibition, good lubricity, fast penetration rate, low cost and remarkable economic benefits.

Exploration and development of oilfields is a systematic project. If one of the links causes serious reservoir damage, it may make other work ineffective and affect the development effect of oilfields. Therefore, the addition of potassium formate drilling fluid not only helps to take measures to protect oil and gas reservoirs, but also reduces damage to oil and gas reservoirs. Potassium formate is in short supply.