Breaking Technical Bottlenecks In Cementing In The Block－ About Cementing Of Nor

Oil-Bearing Area Of Block Ais 12.46km2,,  It Is Developed In The 1970s,With Cumulative Oil Production Of 7.6 Million Tons. As Time Goes On, This Block Has Entered Into The Later Stage Of Development, And The Average Water Content Is Over 87%. This Block Is Characterized By High Density Well Networks, Staggered Oil Wells And Water Wells, Damaged Original Pressure Of Stratum, Complex Oil And Water System In Inter-Layer And Layer. The High Pressure And Low-Permeability Zone Is Formed In The Trap Structures, And Gypsum And Salt Formation Is Discovered On The Target Stratum. As The Silicon Slurry Is Mainly Used In This Block, The Thick False Filter Cake Is Formed And Difficult To Remove. In Recent Years, This Block Faces Great Challenges On The Cementing Operation And Quality Caused By The Reasons Mentioned Above. According To The Data Provided By The Oil Production Plant, The Cementing Quality In Recently Year Of This Block Is Unsatisfied. To Reverse This Passive Situation, The Oil Production Plant And Cementing Company Actively Adjusted Their Thinking, Investigated And Researched Major Oilfields And Oil Well Cement Slurry Providers In China, Continuously Optimized Cementing Technology And Introduced Major Oil Well Cement Slurry Providers At Home And Abroad To Test In This Block. However, The Desired Objectives Cannot Be Achieved.

Finally, In July 2014, OMAX North China Project Management Department Applied The OMAX’s Cement Slurry System For Typical Wells Through Making Joint Efforts In Many Ways, And The Details Are As Follows:

There Are Such Injection Wells AsWell I (Injection Interval 3008.2-3056m), Well II (Injection Interval 2962.9-3115.69m), Well III (Injection Interval 3023.49-3180.1m) And Well IV Small 6-3 (Injection Interval 2968.5-3170.6m) Around The Well (Within 500m);

There Is A Large Section Of Gypsum Horizon At The Upper Part Of  Zao 0 Oil Set;

ZaoIIoil Set, Vertical Depth Of Fault Point Is 2990m, The Corresponding Side Depth Is 3069.08m; And The Fault Distance Is 40m.

For Such Problems, OMAX Spares No Efforts To Innovate, And Actively Participates In The Development Of Cementing Programs, Repeatedly Exchange Ideas With Cementing Company, Oil Production Plant, Drilling Company, Slurry Branches And Other Companies, And Proposes A Number Of Practical And Effective Recommendations, Such As Applying Fiber Slurry And Flushing Spacer Isolation Liquid, Adding The Content Of Flushing Fluid, Increasing The Displacement Of Alternative Slurry, Optimizing The Cement Slurry Thickening Time And Cement Slurry Structure And Installing The Centralizer, And Utilizes The Early Strength Channeling Control Cement Slurry System. Through Practical Applications In Cementing, Drilling, Oil Production And Slurry-Making, The Recommendations Proposed Are Basically Adopted.

At 1 O’clock On August 3, 2014, The Cementing Operation Of This Well Was Successfully Completed.The Well Is Inspected With CBL  Through 48-Hour Cement Curing. All Target Stratum Were Effectively Sealed. Thus, The Cementing Quality Is Good. The Cementing Quality Was Recognized By The Oil Production Plant. The Oil Production Plant Said That The Well Has The Best Cementing Quality In This Block In Recent Year. The Cementing Quality Was Rated As Excellent.

The OMAX’s Attempt In This Region And The Successful Practice In Well 7-5 Are Definitely Not A Simple Accident, While Reflect The Integrated Cementing Technology. Although There Is A Long And Rugged Way To Go, And OMAX Will Face More, Newer And More Serious Challenges, We Believe That We Will Be Able To Go Further In Our Industry As Long As We Uphold The Concept Of Solving Problems For Customers, Learn From OMAX’s Advanced Experiences Over The Past Years, And Adhere To The Spirits Of Challenge And Innovation.