STAR SHIELD 500. Ultra Low Invasion Additive and Wellbore Stabiliser

Transcription

1 STAR SHIELD 500 Ultra Low Invasion Additive and Wellbore Stabiliser

2 Sealing Capacity and Key Benefits STAR SHIELD 500 An Expansion of Impact s FLC 2000 Technology 2

3 STAR SHIELD 500 Seals up to 500um fractures Fast effective barrier laid down across highly permeable formations or microfractures whether induced or in situ. Preventative approach rather than curative: it s already active in the fluid circulating system at the start of the hole section. Quick effective wellbore isolation minimize whole mud, or spurt, and pressure invasion Seals a broad range of pore throats (matrix) and microfractures Bridge at neck of pore throats or fractures Seal is robust, flexible and will withstand high pressure differential Whole mud additive which is: o Dispersed throughout the active system o Constantly laid down o Self-repairing filter cake o Not being depleted by drilling action 3

4 STAR SHIELD 500 Key Benefits The only additive that truly provides preventative formation deformation control and available in the industry today. Products are in the circulating system continuously treating the formation Functions in both OBM & WBM Functions in all lithology's including reservoir Seals up to 500um fractures at high differential pressure (over 3,000psi) Low additive loading o Easier to mud engineer o Less complex solids control o Minimal impact on basic mud properties o Product is robust not shear degraded 4

5 STAR SHIELD 500 Key Benefits Let s design a reservoir fluid that can be compliant in the field not just the lab! Use at 4-8ppb rather than the 30-50ppb required for stress caging No adjustments to the basic mud formulation required Thermally stable to 400 degf Product is robust not shear degraded Does not require specialist solids control equipment (no LCM recovery system) Makes fluids more tolerant field engineering wise o Managing solids loading & psd for Carbonate / graphite mixes? Tolerant to contaminants Makes fluid compliant to wellbore geology heterogeneity. o Covers low permeability represented by API & HTHP filter-paper through to 500um micro-fractures 5

6 STAR SHIELD 500 Conventional bridging solutions Filtrate & pressure invasion creates two time dependencies Short term pressure dominated [sec/mins] Long term filtrate dominated [hours] Influenced by Δρ, geology & mud chemistry API products provide bridging allowing pressure and fluid invasion into the geological matrix 6

7 STAR SHIELD Conventional bridging solutions The same invasion control process is relevant to both wellbore stability and formation damage. 7

8 STAR SHIELD 500 Seal 500um fractures 8

9 STAR SHIELD 500 at 6ppb Before Hot Rolling; Test Pressure: 1,000 psi Initial Spurt after 1minute Total Fluid Loss: 1 minute volume + 15minute volume 9

10 STAR SHIELD Effect of screening on PSD. How much STAR SHIELD 500 is lost when screened over a #40 mesh screen? How will the losses affect consumption rates? Notes: theoretical calculations. In practice, amount of depletion in field conditions is likely to vary due to screen condition, flow rate & mud rheology etc X025 Referred to above is the R&D name of STAR SHIELD

11 STAR SHIELD 500 PPA 12ppg XC Polymer Mud 12ppg 80:20 OBM Disk PPA Testing Product Initial Spurt (ml) Total Fluid Loss (ml) Initial Spurt (ml) Total Fluid Loss (ml) 120 Base ppb STAR SHIELD Base TFL (Pressure not held) 150 6ppb STAR SHIELD Base TFL (Pressure not held) 190 6ppb STAR SHIELD OBM Conditioned 250 F 16 hours Test temperature: 250 F(WBM), 300 F(OBM),Test Pressure:2000psi 11

12 STAR SHIELD 500 vs FLC SBT 12ppg XC Polymer Mud 12ppg 80:20 OBM 4ppb STAR SHIELD 500 6ppb STAR SHIELD 500 Initial Invasion (cm) Final Invasion (cm) Initial Invasion (cm) Final Invasion (cm) OBM Conditioned 250 F 16 hours Test Pressure: 100 psi, 20/40 Frac Sand 12

13 STAR SHIELD 500 HP SBT - 8.5ppg OBM 8.5ppg OBM 8.5ppg 80:20 OBM Conditioned 250 F 16 hours, modified PPA Test Pressure: 1,000psi (gas), 30 minute test duration Test media as shown on chart. 13

14 STAR SHIELD 500 HP SBT -12ppg OBM 12ppg OBM 12ppg 80:20 OBM Conditioned 250 F 16 hours, modified PPA Test Pressure: 1,000psi (gas), 30 minute test duration Test media as shown on chart. 14

15 STAR SHIELD ppg WBM Rheology 12ppg WBM Test Temperature( F) s/10m PV/YP Base Only /9 23/29 6ppb STAR SHIELD 500 (sieved 425µ screen) /8 20/33 Base Only /7 18/25 6ppb STAR SHIELD 500 (sieved 425µ screen) /6 14/26 15

16 STAR SHIELD ppg 80:20 OBM Rheology 12ppg OBM Test Temperatu re( F) s/10m PV/YP ES Base Only /21 24/ ppb STAR SHIELD 500 (sieved 425µ screen) /23 25/ Base Only /18 20/ ppb STAR SHIELD 500 (sieved 425µ screen) /21 22/ OBM Conditioned 250 F 16 hours. 16

17 STAR SHIELD 500 Formation Damage WBM 17

18 STAR SHIELD 500 Formation Damage OBM 12ppg 80:20 invert emulsion OBM (IFS), mineral oil for drawdown Dynamic flow across core faces 18

19 Case history 19

20 Permian Wolfberry Well Name: Pool A3 Location: Ector County, TX Midland Basin Interval drilled: Upper Spraberry HZ hole, 7,796ft -10,095ft MD No wellbore instability or wash-out 3 ½ in liner was run & cemented in upper Spraberry without any downhole losses 20

21 Summary 21

22 STAR SHIELD um fractures Product data indicates it performs very well across a broader fracture size o 6ppb works well across all slot sizes. o Product works well up to 500µm. LC50 at 15ppb is 255Kppm. Plonor classification for Eastern Hemisphere This product would work well with shakers up to 60 mesh but consumption will be aggressive after that. Lab test phase complete; we now require field-trial partners to validate initial testing o Product available on trial commercial terms o Requirement to share all pre job data to identify suitable candidate well(s) o Requirement to share all post job data to build case histories 22

23 Impact Fluid Solutions Ltd Ella Court, Truro Business Park, Threemilestone, Truro, Cornwall, England TR4 9NH United Kingdom