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16/25/14 Confidential Information © 2011 M-I SWACO FORM-A-BLOK A Severe Fluid-Loss Lost Circulation Material Milena Martinez & Lenaia Robinson IPAA project at MI-SWACO - 26 th June, 2014
26/25/14 Confidential Information © 2011 M-I SWACO FLUID LOSS Fluid Loss Loss of the fluid phase of a drilling fluid as it filters through porous rock Leaves a filter-cake behind proportional to fluid / filtrate loss Measured in lab – API, HPHT and DYNAMIC fluid-loss tests One of the most challenging problems faced by Operators while drilling for Oil and Gas is Lost Circulation 16.5ppg Lignosulfonate mud Dynamic Filtration filter-cakes 60min fluid loss 15D, 50µ filter media Base mud 72ml, 25/32 ” Base mud + 3% Black Fury 38ml, 12/32”
36/25/14 Confidential Information © 2011 M-I SWACO LOST CIRCULATION Lost Circulation – refers to loss of whole mud to the formation SEEPAGE Loss < 10 bbl/hr. PARTIAL Loss bbl/hr. Tiger Bullets - A superior bridging agent highly effective when drilling high-permeability / high- porosity zones with high differential pressures HEAVY Loss bbl/hr. SEVERE Loss >40 bbl/hr. Form-A-Squeeze - A high-fluid loss particulate LCM that address severe fluid loss in all types of fractures, vugular formations, matrix and underground blowout events Form-A-Blok - A high-fluid loss fibrous LCM designed for Wellbore Strengthening applications Tiger Bullets Form-A-SqueezeForm-A-Blok
46/25/14 Confidential Information © 2011 M-I SWACO FORM-A-BLOK Description A high-fluid loss fibrous LCM designed for Wellbore Strengthening applications and a wide variety of lost circulation scenarios, including, but not limited to fractures and matrix permeability Characteristic s Easily mixed in freshwater, seawater or base oil/syn. Combined with barite for weighted slurries Placed in and/or across loss zone → liquid phase squeezes from slurry Leaves a semi-permeable plug that seals the formation Not dependent on time, temp., activator/retarder or pH Stop loss occurring in WBMs, NAFs Can be used for seepage 10ppb Can be used as plug to run in front of cement squeeze Can be used as plug to improve casing shoe integrity Application s Mixed according to mud weight 40ppb
56/25/14 Confidential Information © 2011 M-I SWACO WORKING IN THE LAB
66/25/14 Confidential Information © 2011 M-I SWACO PLUGS WHEN MIXED IN WATER Water, gFAB, gBarite, gFiltrate, gPlug wt, g Time to De-fluidize, s Un-weighted ppg ppg API filtration 100psi on a 60 mesh, 250µ scre en
76/25/14 Confidential Information © 2011 M-I SWACO IMPORTANCE OF SHEAR STRENGTH
86/25/14 Confidential Information © 2011 M-I SWACO SHEAR STRENGTH MEASUREMENT
96/25/14 Confidential Information © 2011 M-I SWACO LOAD FRAME & SHEAR STRENGTH MEASUREMENT
106/25/14 Confidential Information © 2011 M-I SWACO BACKGROUND LCM Mud Invasion through frac sand in API fluid loss cell Wet compacted frac sand 2 inches deep Total Fluid Invasion of Base mud through frac 100psi ~0.4 inches Fluid Invasion of Base mud with 8ppb Form-A-Blok after 5 100psi
116/25/14 Confidential Information © 2011 M-I SWACO APPLICATIONS IN NAM, 2014 DateOperatorLocation January Stone EnergyGOM Stone EnergyGOM Energy Partners LimitedGOM February Apache CorporationMid-Continent March BHPPermian Basin Walter Oil & GasGOM April Continental Natural ResourcesMid-Continent OXYSouth Texas Walter Oil & GasGOM May Continental Natural ResourcesOklahoma June Shoreline EnergyLouisiana Continental Natural ResourcesOklahoma
126/25/14 Confidential Information © 2011 M-I SWACO FIELD EXAMPLES RegionMD (ft) EventLCM work? MW in ppg FAB work?Final MW ppg Alaska7881T.L.No9.5Yes10.3 Alaska bphNo9.8Yes10.3 Mexico bphNo14.2Yes12.7 Egypt18737T.L.No12.5Yes12.5 Mexico14436T.L.11.5Yes13.3 Mexico bph16.7Yes16.9 Mexico bph16.7Minor Loss17.5 Mexico bph8.2Yes10.4 Mexico20784T.L.12.5Yes15.8 Mexico bph9.6Minor Loss10.0 Mexico bph16.0Minor Loss17.2
136/25/14 Confidential Information © 2011 M-I SWACO NEW EXCITING DEVELOPMENTS Acid-Soluble Form-A-Blok was recently developed for losses in Production zone 95% acid soluble in 15% 212 °F Shear Strength of ~ 2400 psi compared to ~ 2700psi for regular FAB in water Project is currently underway to enhance Cement’s bonding strength Currently, competitor’s LCM product Diaseal-M is added to Cement To replace with the addition of Form-A-Blok to Cement Initial testing shows – no Contamination effect Up to 120ppb Cement, class G added to 40 ppb FORM-A-BLOK slurry → No change in de-fluidizing rate. Next: To measure Shear Strengths of plugs…in dry and wet conditions
146/25/14 Confidential Information © 2011 M-I SWACO
156/25/14 Confidential Information © 2011 M-I SWACO SPECIAL ACKNOWLEDMENT Schlumberger MI-SWACO Lashaunda Johnson Kumar Ramtahal Josh Sheldon Asma Huissini Ingrid Velasco Brian Rogers Aaron Blue Mishel Grubac Khai Ngyen Tim Wilkin Tim Hubbard Hernan Hernandez
166/25/14 Confidential Information © 2011 M-I SWACO THANK YOU QUESTIONS?
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