Should We Pump Synthetic-Based Mud (SBM) with Cement Unit?

We have a question asking about is it ok to Pump Synthetic-Based Mud (SBM) with Cement Unit?

Therefore, this article aims to address critical concerns that must be considered to ensure the integrity of equipment, operational efficiency, and environmental compliance. The utilization of cement units for pumping Synthetic-Based Mud (SBM) during displacement operations presents several technical and operational challenges.

 

The cement unit (courtesy of SLB)

The cement unit (courtesy of SLB)

1. Valve Compatibility Continue reading

What are Squeeze Cementing Techniques?

what are cement squeeze techniques

Squeeze cementing represents a critical process in the oil and gas industry, where a cement slurry is squeezed through perforations in casing to create a seal in specific locations, bridging undesired gaps. It is a common misconception that the cement penetrates the pores of the rock. Instead, the cement slurry dehydrates against the formation walls, forming a seal cement filter cake. It must be clear that cement does not infiltrate the pores of the rock. Given that cement slurries have particles with a mean size ranging from 20 to 50 microns, the permeability of the formation must be between 2-100 darcies for cement grains to penetrate the formation successfully.

what are cement squeeze techniques Continue reading

Key Factors for Successful Oil Well Cementing

To achieve a successful oil well cementing and ensure zonal isolation in oil well cementing, efficient mud displacement is crucial. Inadequate mud removal can lead to problems like cement channeling, permitting the intrusion of hydrocarbons and communication between permeable zones. The following factors are essential for ensuring a good cement bond:

Continue reading

Casing and Cementing Hardware in Oil Well Operations

Cementing operations in the oil and gas industry are a critical component of well construction and integrity. Proper casing and cementing hardware play a crucial role in ensuring the successful execution of these operations. In this article, we will explore the various equipment used in cementing operations, including guide shoes, float collars, centralizers, cement wiper plugs, and multi-stage collars.

casing and cement hardware

casing and cement hardware

Guide Shoes and Float Shoes: Continue reading

What are Cementing Additives to Enhance Cement Properties

Cementing in the oil and gas industry involves a meticulous process, and cementing additives play a crucial role in fine-tuning the properties of cement slurries. These additives are carefully selected to control slurry density, rheology (flow behavior), fluid loss, and to impart specialized characteristics for effective cement placement in diverse downhole conditions. Let’s explore the various categories of additives used in cementing:

1. Accelerators: Accelerators are chemicals employed to expedite the thickening process of a cement slurry and enhance early strength development. Typically used in conductor and surface casing applications to reduce waiting-on-cement time (WOC), common accelerators include calcium chloride (CaCl2), sodium chloride (NaCl), and seawater. Continue reading